(3GdEKHGJ ai GdehGO GdLfGFjI ai GdbGfhf GdebGQf (B.s (3GdLRA GdChd(B,s (3GdfXQjI GdYGeI(B/s - (3eMehO eMehO eUWais ((3GdbGgQI (B:s (3eWHYI LGeYI GdbGgQI hGdcJGH GdLfGFi (B,s, 1977)
(3GdfU HGddZI GdYQHjIs
Keywords: (3bGfhf LfGFjs; (3GdEKHGJ GdLfGFjs