(3GdSYjOjGJ (B/ s - (3CHh HcQ, SYjOs ((3JhfS (B:s (3GdOGQ GdJhfSjI ddfTQ,s, 1981)
Keywords: (3GdTYQ GdYQHjs; (3GdYUQ GdMOjKs; (3JhfSs