Volume 29, October-December, October 2008, Pages 220-236
Ababutain M.Ibtisam; Barakah F.N; Heggo A.M.
Volume 28, JANUARY- MARCH, January 2007, Pages 38-53
Barakah F.N;; Ababutain M.Ibtisam; Heggo A.M.
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