Berggren,W. A. Alegret,L. Aubry,M. -P Cramer,B. S. Dupuis,C. Goolaerts,S. Kent,D. V. King,C. Knox,R. W. O. Obaidalla,N. Ortiz,S. Ouda,K. A. K. Abdel-Sabour,A. Salem,R. Senosy,M. M. Soliman,M. F. Soliman,A. The dababiya corehole, upper Nile valley, Egypt: Preliminary results Austrian j. earth sci. 2012 2012