Volume 45.2, Issue 90, July 2001, Pages 24-42
H.M. Abdel-Hafeez; S.M. Hegazi; Elham S. Saleh; Samar S. Tawfik
Volume 4.1, Issue 7, January 1977, Pages 191-199
H.M. Abdel-Hafeez; S.M. Tony
Volume 3, Issue 5, May 1976, Pages 151-160
H.M. Abdel-Hafeez; Nabila Gazia
Volume 2, Issue 3.4, May 1975, Pages 99-109
H.M. Abdel-Hafeez; S.M. Tony
Volume 2, Issue 3.4, May 1975, Pages 110-119
H.M. Abdel-Hafeez; Nabila Gazia; M.F. Raghib; A.A. Ismail