Volume 17.1, Issue 33, May 1986, Pages 86-95
M.A. YOUSIF; H.M. EL-ATTAR; ABDEL-RAOUF M. MAHMOUD; S. EL-MAGAWRY
Volume 17.1, Issue 33, May 1986, Pages 96-103
S. EL-MAGAWRY; M. OKELA; M. EZZAT; H.M. EL-ATTAR