Volume 23.2, Issue 46, July 1990, Pages 126-135
A. LOTFI; H. YOUSSEF; Y. HEFNAWY; A. EL-TIMAWY; A. NASSAR
Volume 20.1, Issue 39, May 1988, Pages 110-114
A. LOTFI; H. YOUSSEF; T. EL-KHATEIB; I. SEDDIK; A. EL-TIMAWY; G. ALI
Volume 19.1, Issue 37, September 1987, Pages 101-105
A. LOTFI; H. YOUSSEF; T. EL-KHATIEB; I. SEDDIK; A. EL-TIMAWY; SAMIRA EL-GIBALY; M. GAFAR
Volume 14.2, Issue 28, May 1985, Pages 107-114
H. YOUSSEF; A. EL-TIMAWY; Y. HEFNAWY