Volume 27.2, Issue 54, July 1992, Pages 242-247
M.A. SELEIM; SAMIA M. SELEI M; I.A. IBRAHIM
Volume 27.1, Issue 53, April 1992, Pages 279-283
SAMIA M. SELEI M; M.A. SEL EIM; F.A. MAKADY; S. ABDALLA