(3ef cfhR GdWH GdYQHj (B/s - (3YGQa, eMeO YRJ eMeOs ((3LOI (B- (3GdSYhOjI (B:s (3TQcI ecJHI GdNOeGJ GdMOjKI,s, 1989)
Keywords: (3GdWH GdTYHjs -- (3GdHdGO GdYQHjIs