Volume 3, Issue 5, May 1976, Pages 69-77
T. H. Moustafa; M. Abou-Gabal; S. A. Enab; A. Sarhan
Volume 2, Issue 3.4, May 1975, Pages 232-238
M.H. El-Guindy; A.A. Shokeir; I.A. Wasfey; K.K. Ahmed; A. Elbedeiwy; M. Abou-Gabal; M.S. El-Rehewy.