Volume 2, Issue 3.4, May 1975, Pages 47-54
Y.M. Shahien; S.A. EL Mougy
Volume 2, Issue 3.4, May 1975, Pages 55-64
Y.M. Shahien; S.A. El Mougy
Volume 1, Issue 1.2, May 1974, Pages 15-24
Y.M. Shahien; M-F. Fahmy; S.M. El-Shafei