Volume 41.2, Issue 82, July 1999, Pages 202-216
Mary G. Abd El-Malak; H.M. Hasaan; Magda A. El-Sheltawi; G. Abd El-Malak
Volume 40.2, Issue 80, January 1999, Pages 333-344
Mary G. Abdel-Malak; M.A. El-Sheltawi; H.M. Hassan; G. Abdel-Malak; K.N. Mettias