(3TQM bGfhf CUhd GdeMGceGJ GdLRGFjI GddHffj(B.s (3GdLRA GdKGfi(B/s - (3ahRjI YHOGdSJGQs ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI (B,s, 1977)
(3GdfU HGddZI GdYQHjIs
Keywords: (3bGfhf LfGFi s; (3ELQGAGJ GdeMGceI GdLfGFjIs