Volume 4, ASAT CONFLENCE 14-16 May 1991 , CAIRO, May 1991, Pages 77-88
A. A. ZAYED; M. M. EL-MADDAH; M. A. EL-SENBAWI
Volume 4, ASAT CONFLENCE 14-16 May 1991 , CAIRO, May 1991, Pages 271-283
M. M. EL-MADDAH; N. A. EL-SEBAI