Volume 11.2, Issue 22, January 1984, Pages 41-50
M.A.M. FAHMY; M.S. ARAFA; R. KHALIFA; A.M. ABDEL-RAHMAN; M.E. MOUNIB
Volume 8, Issue 15.16, January 1981, Pages 77-80
M.AM. FAHMY; R. KHALIFA; A.M. ABDEL-RAHMAN