(3GdVQGFH GdYbGQjI hGdJfejI GdGbJUGOjI (B/s - (3MGeO YHOGdeLjO OQGRs ((3GdGScfOQjI (B:s (3eDSSI THGH GdLGeYI,s, 1989)
. 240-220 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdVQGFH GdYbGQjI s; (3GdeGdjI GdYGeI h GdJTQjY GdVQjHj s