(3SdWI GdJaJjT GdLfGFj aj GdbGfhf GdYQGbj (B/s - (3CcQe fTCJ EHQGgje(B.s ((3HZOGO (B: s (3eWHYI GdeYGQa,s, 1960)
(3GdfU HGddZI GdYQHjIs
Keywords: (3bGfhf GdELQGAGJ GdLfGFjIs -- (3GdYQGbs; (3GdJaJjT GdLfGFjs