Benisch, K. ; Köhn, Daniel ; al Hagrey, Said Attia ; Rabbel, Wolfgang ; Bauer, S.:
A combined seismic and geoelectrical monitoring approach for CO2 storage using a synthetic field site. .
In: Environmental Earth Sciences (2014), Nr. ?, S. 1-18
[doi>10.1007/s12665-014-3603-0]

Benisch, K. ; Köhn, Daniel ; al Hagrey, Said Attia ; Rabbel, Wolfgang ; Bauer, S.:
A combined seismic and geoelectrical monitoring approach for CO2 storage using a synthetic field site. .
In: Environmental Earth Sciences (2014), Nr. ?, S. 1-18
[doi>10.1007/s12665-014-3603-0]

al Hagrey, Said Attia ; Köhn, D. ; Rabbel, Wolfgang:
Geophysical assessments of renewable gas energy compressed in geologic pore storage reservoirs .
In: SpringerPlus (2014), Nr. 3:267, S. 1-16
[doi>10.1186/2193-1801-3-267]

Siebrands, S. ; al Hagrey, Said Attia ; Rabbel, Wolfgang:
3D ERT in boreholes for mapping CAES plume in saline aquifers .
In: EAGE (Hrsg.) : Proceedings of the 2nd Sustainable Earth Sciences Conference & Exhibition (SES 2013)
(2nd Sustainable Earth Sciences Conference & Exhibition (SES 2013), Pau, France).
2013, S. 5p..

Köber, R. ; Wiegers, C. ; Schäfer, D. ; Beyer, M. ; Tischer, L. ; Großmann, J. ; al Hagrey, Said Attia ; Helkjaer, M. ; Auken, E. ; Foged, N. ; Gräber, M. ; Dahmke, Andreas:
Baseline monitoring and simulated effects of CO2 leakages in near-surface aquifers .
In: Kühn, M. (Hrsg.) : CO2 Large-scale Enhanced Gas Recovery in the Altmark Natural Gas Field -- GEOTECHNOLOGIEN Science Report.
Bd. 19. Berlin, Heidelberg : Springer, 2013, S. 137-?.

Benisch, Katharina ; Köhn, Daniel ; al Hagrey, Said Attia ; Rabbel, Wolfgang:
Comparative study of CO2 mass quantification using process modelling and geophysical techniques .
In: EAGE (Hrsg.) : Proceedings of the 2nd Sustainable Earth Sciences Conference & Exhibition (SES 2013)
(2nd Sustainable Earth Sciences Conference & Exhibition (SES 2013), Pau, France).
2013, S. 5p..

Lück, E. ; Diercke, C. ; Werban, U. ; Wunderlich, Tina ; al Hagrey, Said Attia ; Petersen, Hauke ; Loonstra, E. ; Rühlmann, J.:
Comparison of mobile multi-sensor platforms at the test-site Rosslau in Germany .
In: ? (Hrsg.) : Bornimer Agrartechnische Berichte 82
(3rd Global Workshop on Proximal Soil Sensing, Potsdam, 26-29 May 2013).
2013, S. 276-282.

Schäfer, Dirk ; al Hagrey, Said Attia ; Auken, E. ; Bahr, A. ; Beyer, M. ; Dahmke, Andreas ; Dumke, I. ; Foged, N. ; Furche, M. ; Gräber, M. ; Großmann, J. ; Helkjaer, M. ; Köber, R. ; Poggenburg, J. ; Naue, G. ; Schlömer, S. ; Seeger, C. ; Tischer, L. ; Vidal, A. ; Wiegers, C. ; Wöhrl, C.:
Environmental and Process Monitoring .
In: Kühn, M. (Hrsg.) : Advanced Technologies in Earth Sciences.
Bd. 6. Berlin, Heidelberg : Springer, 2013, S. 131-167.

al Hagrey, Said Attia ; Siebrands, S. ; Köhn, Daniel ; Rabbel, Wolfgang:
Feasibility study of applying geoelectric and gravity techniques for CAES reservoir monitoring .
In: EAGE (Hrsg.) : Proceedings of the 2nd Sustainable Earth Sciences Conference & Exhibition (SES 2013)
(2nd Sustainable Earth Sciences Conference & Exhibition (SES 2013), Pau, France).
2013, S. 5p..

Köhn, Daniel ; al Hagrey, Said Attia ; Rabbel, Wolfgang:
Monitoring of underground gas storage sites by elastic 2D time-lapse waveform inversion .
In: EAGE (Hrsg.) : Proceedings of the 2nd Sustainable Earth Sciences Conference & Exhibition (SES 2013)
(2nd Sustainable Earth Sciences Conference & Exhibition (SES 2013), Pau, France).
2013, S. 5p..

Wunderlich, Tina ; Petersen, H. ; al Hagrey, Said Attia ; Rabbel, Wolfgang:
Pedophysical models for resistivity and permittivity of partially water-saturated soils. .
In: Vadose Zone Journal (2013), Nr. 12(4),

al Hagrey, Said Attia ; Strahser, M. ; Rabbel, Wolfgang:
Seismic and Geoelectric Modelling Studies of Parameters Controlling CO2 Geostorage in Saline Reservoirs .
In: International Journal of Greenhouse Gas Control IJGGC-856 (2013), S. 11p.
[doi>10.1016/j.ijggc.2013.01.041.]

al Hagrey, Said Attia:
2D model study of CO2 Plumes in Saline Reservoirs by Borehole Resistivity Tomography .
In: International Journal of Geophysics 2011 (2012), Nr. Article ID 805059, S. 12 pages
[doi>10.1155/2011/805059]

Petersen, Hauke ; Wunderlich, Tina ; al Hagrey, Said Attia ; Rabbel, Wolfgang:
Characterization of some Middle European soil textures by gamma-spectrometry .
In: Journal of Plant Nutrition and Soil Science 175 (2012), Nr. 5, S. 651-660

al Hagrey, Said Attia:
Geophysical Imaging Techniques .
In: Mancuso, S. (Hrsg.) : Measuring Roots - An update Approach.
Heidelberg : Springer, 2012, S. 151-188.
[doi>10.1007/978-3-642-22067-8_10]

al Hagrey, Said Attia:
2D optimized electrode arrays for borehole resistivity tomography and CO2 sequestration modelling .
In: Pure and Applied Geophysics (2011),
[doi>10.1007/s00024-011-0369-0]

Köber, R. ; Wiegers, C. ; Schäfer, D. ; Beyer, M. ; Tischer, L. ; Großmann, J. ; al Hagrey, Said Attia ; Helkjaer, M. ; Auken, E. ; Gräber, M. ; Dahmke, Andreas:
Baseline monitoring and simulated effects of CO2 leakages in near-surface aquifers .
In: Geotechnologien (2011), S. 9p.

al Hagrey, Said Attia:
CO2 Plume modeling in deep saline reservoirs by 2D ERT in boreholes .
In: The Leading Edge 30 (2011), Nr. 1, S. 24-33

al Hagrey, Said Attia ; Petersen, T.:
Numerical and experimental mapping of small root zones using optimized surface and borehole resistivity tomography .
In: Geophysics 76 (2011), Nr. 2, S. G1-G11

Strahser, Matthias ; al Hagrey, Said Attia ; Rabbel, Wolfgang:
CO2-migration in saline formation: first results of geoelectric and seismic numeric modeling .
In: Mitteilungen, Deutsche Geophysikalische Gesellschaft 2 (2010), S. 4-14

Wunderlich, Tina ; al Hagrey, Said Attia ; Petersen, Hauke ; Rabbel, Wolfgang:
Pedophysical study of electrical properties and water content, laboratory and field experiments .
In: EAGE (Veranst.):
Near Surface
(16th European Meeting of Environmental and Engineering Geophysics, Zürich, 6-9.9.2010).
Zürich : EAGE, 2010, S. 5p..

al Hagrey, Said Attia:
2D Optimisation of electrode arrays for borehole surveys .
In: Near Surface, 15th European Meeting of Environmental and Engineering Geophysics, Dublin, Ireland, 7.-9.Sept. (2009), S. 5 pages

Werban, U. ; Nuesch, A.K. ; Pohle, M. ; van Egmond, F.M. ; Wunderlich, Tina ; al Hagrey, Said Attia ; Dietrich, P.:
iSOIL - Integration of geophysical technologies in measuring platforms .
In: Near Surface, 15th European Meeting of Environmental and Engineering Geophysics, Dublin, Ireland, 7.-9.Sept. (2009), S. 5 pages

Petersen, T. ; al Hagrey, Said Attia:
Mapping root zones of small plants using surface and borehole resistivity tomography .
In: The Leading Edge 28 (2009), Nr. 10, S. 1220-1224

Petersen, T. ; al Hagrey, Said Attia:
Numerical and experimental mapping of root zone using surface and borehole resistivity tomography .
In: Near Surface, 15th European Meeting of Environmental and Engineering Geophysics, Dublin, Ireland, 7.-9.Sept. (2009), S. 5 pages

Petersen, T. ; al Hagrey, Said Attia:
Numerical and experimental mapping of root zone using surface and borehole resistivity tomography .
In: 69th Meeting of the German Geophysical Society (DGG), 23.-26. March, Kiel (2009),

al Hagrey, Said Attia:
First numerical ERT models for CO2 plumes in saline reservoirs using crosshole configurations .
In: European Association of Geosciences & Engineers, First EAGE CO2 Geological Storage Workshop - Budapest, Hungary, 29.-30. September 2008, Extended Abstract (2008), S. 5 Pages

Germann, P. ; al Hagrey, Said Attia:
Gravity-driven and viscosity dominated infiltration into a full-scale sand model .
In: Vadose Zone Journal 7 (2008), S. 1160-1169
[doi>10.2136/vzj2007.0172]

Germann, P.F. ; al Hagrey, Said Attia:
Hydromechanical considerations of preferential infiltration into a 1:1 scale sand model .
In: Vadose Zone Journal (2008),

Werban, U. ; al Hagrey, Said Attia ; Rabbel, Wolfgang:
Monitoring of root zone water content in the laboratory by 2D geoelectrical tomography .
In: Journal of Plant Nutrition and Soil Science (2008), Nr. 171, S. 927-935
[doi>10.1002/jpln.200700145]

al Hagrey, Said Attia:
Geophysical imaging root-zone, trunk and moisture heterogeneity .
In: Journal of Experimental Botany 85 (2007), S. 839-854

Schmalz, Britta ; al Hagrey, Said Attia ; Werban, U. ; Meißner, Rolf ; Rabbel, Wolfgang ; Ismaeil, A.:
The "GeoModel" at Kiel University - A full scale model for hydrogeophysical studies of soil structures and processes .
In: Mitteilungen Deutsche Bodenkundliche Gesellschaft 110 (2007), Nr. 1, S. 135-136

al Hagrey, Said Attia:
Electrical resistivity imaging in woody tree trunks .
In: Near Surface Geophysics 4 (2006), S. 177-185
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia ; Werban, U. ; Michaelsen, J. ; Ismaeil, A.:
Hydrogeophysical investigations at a cork oak habitat in Portugal .
In: Interurban, Workshop II, "Water and Organic Matter in Anthropogenic Soils: Dynamics and Processes", 29.-31.3.2006 Berlin (2006),

Werban, U. ; al Hagrey, Said Attia ; Rabbel, Wolfgang:
Hydrogeophysical monitoring of root zone water content in the lab .
In: Journal of Nutrition and Soil Science (2006),

Hanafy, Sh.M. ; al Hagrey, Said Attia:
Radar tomography for soil moisture heterogeneity .
In: Geophysics 71 (2006), S. k9-k18
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE; GeoModel

Werban, Ulrike ; al Hagrey, Said Attia:
Hydrogeophysical observation of soil moisture variations in the root zone .
In: Meeting, Near Surface Geophysics, European Association of Geoscientists and Engineers Palermo, Italy (2005), S. 4
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia ; Meißner, Rolf ; Ismaeil, A.:
Applied dc resistivity for tree trunks .
In: Meeting, Near Surface Geophysics, European Association of Geoscientists and Engineers Utrecht (2004), S. 4
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia ; Meißner, Rolf:
Botanical problems, studied by applied geophysics .
In: Mitt. Dt. Geophys. Ges. 2 (2004), S. 2-8
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia:
GPR-application for mapping toluene infiltration in a heterogeneous sand model .
In: Journal of Environmental and Engineering Geophysics 9 (2004), S. 79-85
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE; GeoModel

al Hagrey, Said Attia ; Meißner, Rolf ; Werban, Ulrike ; Ismaeil, A. ; Rabbel, Wolfgang:
Hydro-, bio-geophysics - Approaches for structure and process .
In: The Leading Edge 23 (2004), S. 670-674
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia ; Werban, Ulrike ; Ismaeil, A.:
Hydrogeophysical investigations of a cork oak habitat, Portugal .
In: Meeting, Near Surface Geophysics, European Association of Geoscientists and Engineers Utrecht (2004), S. 4
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia ; Meißner, Rolf ; Ismaeil, A.:
Hydrogeophysical study at an olive farm, S. Italy .
In: Meeting, Near Surface Geophysics, European Association of Geoscientists and Engineers Utrecht (2004), S. 4
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia ; Werban, Ulrike ; Michaelsen, J. ; Ismaeil, A.:
Hydrogeophysikalische Untersuchung der Wasserversorgung eines Korkeichenstandortes in Portugal während der Trockenphase im Sommer, Landnutzungsbedingte Bodenheterogenität und ihre Folgen .
In: Jahrestagung 2004 des Arbeitskreises BodenGeographie (AK BoGeo) Kiel (2004), S. 4
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia:
GPR mapping toluene infiltration in a sand model .
In: 8th Ann. Mtg., Env. and Eng. Geophys. Soc., Eur. Sect. Aveiro, Portugal (2002), S. 4
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE; GeoModel

Hanafy, Sh. ; al Hagrey, Said Attia:
GPR tomography for mapping soil moisture and roots .
In: 8th Ann. Mtg., Env. and Eng. Geophys. Soc., Eur. Sect. Aveiro, Portugal (2002), S. 4
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia ; Michaelsen, J.:
Hydrogeophysical soil study at a drip irrigated orchard, Portugal .
In: European Journal of Environmental and Engineering Geophysical Society 7 (2002), S. 75-93
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia:
The full scale GeoModel at Kiel University for hydrogeophysical techniques .
In: 8th Ann. Mtg., Env. and Eng. Geophys. Soc., Eur. Sect. Aveiro, Portugal (2002), S. 4
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE; GeoModel

al Hagrey, Said Attia ; Meißner, Rolf ; Widmoser, Peter:
Die Wasserverteilung im Boden, beobachtet mit den Methoden der Geophysik .
In: Wasser und Boden 52 (2000), S. 57-61
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE; GeoModel

al Hagrey, Said Attia ; Widmoser, Peter ; Michaelsen, J.:
Geophysical and hydrological soil studies at peach orchards, Atalaia, I: Soil water flow at the study site of drip .
In: 6th Ann. Mtg., Env. & Engg. Geophys. Soc., Eur. Sect. Bochum (2000), S. 4
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia ; Widmoser, Peter ; Michaelsen, J.:
Geophysical and hydrological soil studies at peach orchards, Atalaia, II: Soil moisture regime with water stress and under ponding infiltration of dye tracers .
In: 6th Ann. Mtg., Env. & Engg. Geophys. Soc., Eur. Sect. Bochum (2000), S. 4
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia ; Müller, Christian:
GPR-study of pore water content and salinity in sand .
In: Geophys. Prospecting 48 (2000), S. 63-85
Stichwörter:  GeoModel

al Hagrey, Said Attia ; Meißner, Rolf ; Widmoser, Peter:
Präferenzielle Fließwege - Ein Gemeinschaftsprojekt von Geophysik und Wasserwirtschaft an der Universität Kiel .
In: Wasser & Boden 1 (2000), Nr. 2, S. 57-62
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE; GeoModel

al Hagrey, Said Attia ; Schubert-Kempnauer, T. ; Wachmuth, D. ; Michaelsen, J. ; Meißner, Rolf:
Preferential flow: First results of a full scale flow model .
In: Geophysical Journal International 138 (1999), S. 643-654
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE; GeoModel

Widmoser, Peter ; al Hagrey, Said Attia ; Michaelsen, J.:
Soil moisture regimes under drip-irrigation with and without moisture stress under peach trees (Portugal) .
In: Seminaire "Echanges hydriques des couverts discontinus! Oeiras, Portugal 17.-20.5.1999 (1999), S. 12
Stichwörter:  Ingenieurgeophysik; Hydrogeophysik; WATERUSE

al Hagrey, Said Attia ; Schubert-Kempnauer, T. ; Wachmuth, D. ; Michaelsen, J. ; Meißner, Rolf:
Flow paths in a full scale model .
In: 4th Ann. Mtg. Env. & Engg. Geophys. Soc., Eur. Sect., Barcelona (1998), S. 271-274
Stichwörter:  GeoModel

Michaelsen, J. ; al Hagrey, Said Attia ; Heincke, B. ; Könemann, J. ; Meißner, Rolf ; Müller, Christian ; Schubert-Klempnauer, T. ; Stümpel, Harald ; Wachsmuth, D. ; Widmoser, P. ; Worm, S.:
Geophysikalische Methoden zur Erfassung des dreidimensionalen Wassertransports - erste Ergebnisse aus Versuchen an einem großen physikalischen Bodenmodell .
In: Seminar "Ansätze zur Quantifizierung von feldskaligen Wasser- und Stoffflüssen", Inst. f. Bodenlandschaftsforschung, Müncheberg, Inst. Wasserw. Landschaftsöko., Kiel, 1.-2.12.1998 (1998), S. 10
Stichwörter:  GeoModel

al Hagrey, Said Attia ; Nies, M. ; Frank, A. ; Heincke, B. ; Hartwigsen, H.:
Untersuchung zeitlicher Variationen der Bodenfeuchte mit geoelektrischen und bodenhydrologischen Methoden in Hohenschulen (Norddeutschland) - Erste Ergebnisse .
In: VII-Arbeitsseminar "Hochauflösende Geoelektrik", Univ. Leipzig (1998), S. 5p

Wachsmuth, D. ; Könemann, J. ; al Hagrey, Said Attia:
3D Kartierung von Fließwegen in einem kontrolliertem Infiltrationsexperiment .
In: VI-Arbeitsseminar "Hochauflösende Geoelektrik", Univ. Leipzig (1997), S. 5p

Könemann, J. ; al Hagrey, Said Attia ; Rabbel, Wolfgang ; Burmeister, J. ; Laessig, F. ; Hackbusch, W.:
3D Widerstandsmodellierung bei schrägen und elektrisch isolierten Seitenwänden .
In: VI-Arbeitsseminar "Hochauflösende Geoelektrik", Univ. Leipzig (1997), S. 7

Müller, Christian ; al Hagrey, Said Attia:
Das Georadarverfahren zur Bestimmung von Wassersalinitäten und Wassersättigung .
In: VI-Arbeitsseminar "Hochauflösende Geoelektrik", Univ. Leipzig (1997), S. 4p

al Hagrey, Said Attia ; Schubert-Klempnauer, T. ; Michaelsen, J. ; Worm, S. ; Heincke, B. ; Könemann, J. ; Müller, Christian ; Wachsmuth, D.:
Forschungsprojekt, Präfenezielle Fließwege, Erste Ergebnisse .
In: VI-Arbeitsseminar "Hochauflösene Geoelektrik", Univ. Leipzig (1997), S. 10

Michaelsen, J. ; al Hagrey, Said Attia ; Worm, S.:
Infiltrationsexperimente zur Erfassung vom präferenziellen Fluss in der vadosen Zone .
In: V-Arbeitsseminar "Hochauflösende Geoelektrik", Univ. Leipzig (1996), S. 4

al Hagrey, Said Attia ; Michaelsen, J.:
Tracing soil water flow using resistivity and percolation methods at Bokhorst, Germany .
In: Extended Abstracts, Meeting, Environmental and Engioneering Geophysics Society, European Section, Nantes (1996), S. 322-325

al Hagrey, Said Attia ; Schubert-Klempnauer, T. ; Michaelsen, J. ; Könemann, J.:
Vorstellung des Forschungsprojektes "Präferentielle Fließwege" .
In: V-Arbeitsseminar "Hochauflösende Geoelektrik", Univ. Leipzig (1996), S. 4

al Hagrey, Said Attia ; Strupp, A. ; Geyik, N. ; Stümpel, Harald:
Mapping contamination plumes in groundwater using resistivity measurements, "Kartierung von Kontaminationsfahnen im Grundwasser mit Widerstandsmessungen" .
In: Mittelungen Deutsche Geophysikalische Gesellschaft (DGG) 3 (1995), S. 3-10

Klingbeil, R. ; al Hagrey, Said Attia:
Continuous vertical electric soundings(CVES) for mapping of contamination plumes in groundwater, "Kontinuierliche vertikale elektrische Sondierungen (CVES) für die Kartierung von Kontaminationsfahnen im Grundwasser" .
In: 2. DGG-Seminar, Umweltgeophysik, Neustadt/Weinstraße, 23.2.-26.2.1993, Mittelungen Deutsche Geophysikalische Gesellschaft, Sonderband II (1994), S. 83-86

al Hagrey, Said Attia:
Electric study of fracture anisotropy at Falkenberg, Germany .
In: Geophysics 59 (1994), S. 881-888

Göbel, B. ; Michaelsen, J. ; Dankwardt, E. ; al Hagrey, Said Attia ; Meyer, C. ; Petzold, G. ; Stolte, C. ; Thierbach, R.:
Geophysical methods for determining water distribution and water transport processes in soils, "Geophysikalische Methode zur Erfassung von Wasserverteilungen und Wassertransportvorgängen in Böden" .
In: Mittelungen Deutsche Bodenkundliche Gesellschaft 72 (1993), S. 111-114

Göbel, B. ; Michaelsen, J. ; Dankwart, E. ; al Hagrey, Said Attia ; Meyer, C. ; Petzold, G. ; Stolte, C. ; Thierbach, R.:
Geophysikalische Methoden zur Erfassung von Wasserverteilung und Wassertransport in Böden .
In: Mittelungen Deutsche Bodenkundliche Gesellschaft 72 (1993), S. 111-114

al Hagrey, Said Attia:
Waste site modelling using a combination of electromagnetic induction and resistivity sounding measurements .
In: Environmental Technology 13 (1992), S. 275-280

Refai, E. ; Maamoun, M. ; El-Defrawy, M. ; al Hagrey, Said Attia ; Hamada, G.:
A preliminary report on the frequency characteristics of near-surface layers in the vicinity of the High Dam Lake .
In: Journal of Geodynamics 4 (1991), S. 105-110

Dafrawey, M.A. ; al Hagrey, Said Attia:
Seismic and geoelectric studies of subsurface sediments at shallow depths in the area of Garf Hussein, south of Aswan, Egypt .
In: Journal of Egyptian Geophysical Society (1989),

al Hagrey, Said Attia:
Absorption band model Q^{(-1) beneath marginal areas of continental plates} .
In: Journal of Egyptian Geophysical Society (1988),