Volume 31.1, Issue 61, April 1994, Pages 37-55
H.M. A'BOUL—DAHAB; M.R. EL—HELW; A.E. YASEEN; GS. Amin
Volume 30.2, Issue 60, January 1994, Pages 329-362
H.A. ABOUL DAHAB; M.R. EL—HELW; A.E. YASEENH; G.S. AMIN