Geological and geophysical investigations on the entrance of Wadi Al-Assiuti, Upper Egypt. Bull.Fac.Sci., Assiut Univ., 21(2-F), 129-151. Research Authors Youssef,M.M., Al-Hussaini,A., Abdel Ati, A., and Bakheit,A.,(1992): Research Department Department of Geology Research Member Moustafa Mahmoud Mohamed Youssef Research Year 1992