Volume 57, Issue 130, July 2011, Pages 1-10
Nagah M. Saad; Enas El-Prince
Volume 50, Issue 100, January 2004, Pages 84-99
Nagah M. Saad; Enas El-Prince
Volume 49, Issue 98, July 2003, Pages 97-107
Nagah M. Saad; A. El-R. Thabet
Volume 45.2, Issue 90, July 2001, Pages 178-189
Nagah M. Saad; D.A. Salem; M.S. Sabreen