Volume 11.2, Issue 22, January 1984, Pages 1-5
M.R. FATH-ELBAB; A. HIFNY; A.K. AHMED; M. EL-M. ABDEL-MONEIM
Volume 11.1, Issue 21, June 1983, Pages 19-24
M.R. FATH-ELBAB; A, HIFNY; A.K. AHMED; M. EL-M. ABDEL-MONEIM