Volume 35.2, Issue 70, July 1996, Pages 47-71
I.H. AHMED; N.H. SALEH; S.A. ATALLAH; H.A. FETAIH; OMAIMA EZZO
Volume 33.2, Issue 66, July 1995, Pages 191-198
H.A. FETAIH; N.H. SALEH