Volume 3, Issue 5, May 1976, Pages 93-101
H. Y. El-Hammady; M.N. Makled; A.A. Amer
Volume 2, Issue 3.4, May 1975, Pages 261-269
H.Y, El-Hammady; M.N. Makled
Volume 1, Issue 1.2, May 1974, Pages 255-266
A.M. Osman; H.Y. El-Hammady; M.N. Makled