Volume 37.1, Issue 73, April 1997, Pages 201-211
H.M. EL-MAGHRABY; A.H. ATTA
Volume 36.1, Issue 71, October 1996, Pages 125-137
H.M. EL-MAGHRABY
Volume 30.1, Issue 59, October 1993, Pages 221-228
S.F. ISMAIL; I.H. AHMED; H.M. EL-MAGHRABY