Volume 30.1, Issue 59, October 1993, Pages 87-100
K. ASHMAWY; M. HILALI; S.A. ABU EL-WAFA; H. SAMAHA; A.A. DRAZ; A. SALEM
Volume 30.1, Issue 59, October 1993, Pages 101-113
K. ASHMAWY; S.A. ABU EL-WAFA; M.M. EL-BAHI; M.R. DIAB