Volume 12.1, Issue 23, May 1984, Pages 160-163
H. IBRAHIM; M. HAFEZ; M.S. HASSAN; N.K. HASSAN
Volume 10.2, Issue 20, January 1983, Pages 132-139
SAMIA, M. EL-SAYYAD; A.M. HAFEZ; NABILA GAZIA; N.K. HASSAN