(3UhQI ef GdHWhdI aj GdLRGFQ (B/s - (3eMeO UGdM GdUOjb s; (3aGVd GdeSYhOjs ((3bSfWjfI (B-(3GdLRGFQ (B:s (3eWHYI GdHYK ,s, 1981)
Keywords: (3GdLRGFQ s; (3HWhdI GdLRGFQs