Volume 31.2, Issue 62, July 1994, Pages 63-73
SOHEIR A. ABD El-REHIM; FAYZA M. SOLIMAN; E. ABU-AMRA
Volume 30.2, Issue 60, January 1994, Pages 102-114
NAGWA M. EL-SAWI; M. ABDEL-NASSER; E. ABU-AMRA; A. SH. SEDDEK