(3GdhLjR aj TQM GdbGfhf GdJLGQj GdYQGbj (B: s (3GdLRA GdGhd aj GdGYeGd GdJLGQjI hGdJLGQ (B/ s - (3jGedcj , CcQe s ((3HZOGO (B: s (3eWHYI GdYGfj , s, 1971)
Keywords: (3GdbGfhf GdJLGQj s -- (3GdYQGb s