Volume 27.2, Issue 54, July 1992, Pages 137-147
Th.S. NAFIE; M.G. HASSAN; AMAL M. EL-NAHLA; R.F. EL-SAYED
Volume 27.2, Issue 54, July 1992, Pages 162-167
R.F. EL-SAYED; A.A. SIAM
Volume 27.1, Issue 53, April 1992, Pages 169-174
TH.S. NAFIE; R.F. EL-SAYED
Volume 27.1, Issue 53, April 1992, Pages 175-187
R.F. EL-SAYED; TH.S. NAFIE; A. EL-MELIGY
Volume 27.1, Issue 53, April 1992, Pages 188-194
R.F. EL-SAYED; M. ABDEL-TAWAB