Volume 27.1, Issue 53, April 1992, Pages 279-283
SAMIA M. SELEI M; M.A. SEL EIM; F.A. MAKADY; S. ABDALLA
Volume 26.2, Issue 52, January 1992, Pages 230-240
S.EL-M. ALI; F.M. MAKADY; I.H. AHMED; M.A. SEL EIM
Volume 25.1, Issue 49, April 1991, Pages 160-164
M.A. SEL EIM; I.H. AHMED; S.M. ALI
Volume 23.2, Issue 46, July 1990, Pages 209-212
F.M. MAKADY; M.A. SEL EIM; A.S. SALEH