Volume 37.2, Issue 74, July 1997, Pages 96-116
M.A. SEMIEKA; S. Kh. ABD EL-GHAFFAR
Volume 33.2, Issue 66, July 1995, Pages 156-160
M.A. SEMIEKA
Volume 25.1, Issue 49, April 1991, Pages 48-60
A.M. ABD-ELLAH; M.A. SEMIEKA