(3efGRYGJ GdYGedjf HGdbWGY GdYGe (B:s (3GdTcdjI hGdehVhYjI(B.s (3GdLRA GdKGfj (B/s - (3eMehO efUhQs ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI,s, 1972)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbGfhf GdEOGQjs; (3JGOjH GdYGedjf HGdbWGY GdYGes