(3GdefGN GdRQGYj aj GdhWf GdYQHj (B: s (3GdCQOf (B/ s - (3GdefXeI GdYQHjI ddJfejI GdRQGYjIs ((3GdNQWhe (B:s (3LGeYI GdOhd GdYQHjI (B- (3GdefXeI GdYQHjI ddJfejI GdRQGYjI,s, 1976)
Keywords: (3GdRQGYIs; (3GdCQOfs