(3GdJUha GdGSdGej (B: (3JGQjNg heOGQSg hWHjYJg hGKQg (B/s - (3YjGO, GMeO Jhajbs ((3GdbGgQI(B:s (3ecJHI GdGfLdh GdeUQjI ,s, 1970)
Keywords: (3GdGSdGe s -- (3GdWQb GdUhajI s