(3GdLh h JbdHGJg (B/ s - (3JGfgjd, GjaGf QGjs; (3GdafOj, LeGd GdOjfs ((3GdbGgQI (B:s (3OGQ GdeYGQa,s, 1990)
Keywords: (3GdCQUGO GdLhjIs; ((3SfI (B18-15) (3fGTFhf cHGQs