(3JYLjd GdSbjG ai JYHjQ GdQDjG (B/ s - (3GMeO aQjOs ((3GdQjGV (B: s (3ecJHI GdUMGHI , s, 1991)
Keywords: (3GdQDjGs; (3GdGMdGe (B- (3JaSjQs