Volume 21.1, Issue 41, January 1989, Pages 93-96
M.K. IBRAHIM; MAHMOUD A.Z.; R. KHALIFA
Volume 20.2, Issue 40, September 1988, Pages 49-53
A.M. MANDOUR; R. KHALIFA; M.E.M. MONIB
Volume 20.2, Issue 40, September 1988, Pages 67-74
R. KHALIFA; M.E.M. MONIB; A.M. MANDOUR
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 11.2, Issue 22, January 1984, Pages 51-57
M.A.M. FAHMY; M.S. ARAFA; R. KHALIFA; A.M. ABDEL RAHMAN; M.E. MOUNIB
Volume 10.2, Issue 20, January 1983, Pages 68-73
A.A, SAKLA; R. KHALIFA
Volume 10.2, Issue 20, January 1983, Pages 74-77
A.A. SAKLA; R. KHALIFA
Volume 8, Issue 15.16, January 1981, Pages 71-75
M.AM. FAHMY; R. KHALIFA; A.A. SAKLA
Volume 8, Issue 15.16, January 1981, Pages 77-80
M.AM. FAHMY; R. KHALIFA; A.M. ABDEL-RAHMAN
Volume 7.1, Issue 13.14, January 1980, Pages 139-147
M.A.M. FAHMY; R. KHALIFA; H. YOUSSEF