Volume 32.2, Issue 64, January 1995, Pages 39-51
YOUSRIA A. ABDEL-RAHMAN; A. ABOU-ELMAGD; A.O. SALEM
Volume 32.1, Issue 63, October 1994, Pages 16-30
YOUSRIA A. ABDEL-RAHMAN; A.O. SALEM; A. ABOU-ELMAGD