Authors: Abu-Assab, NAbu-Samreh, M., MAbu-Taha, M., IDarwish, S., Kitaneh, R., M-LLeghrouz, A., ASaleh, A., MJournal Name: Betehlehem University JVolume: 23Issue: 1Pages From: 9To: 20Date: Thursday, January 1, 2004