(3JcfhdhLjG GdGYdGe aj GdeLGd GdJYdjej h GdJQHhj (B/s - (3eGLj GdMdhGfj,MSjf s ((3GdbGgQI (B:s (3OGQ GdacQ GdYQHj ,s, 1988)
Keywords: (3GdGYdGe s; (3GdJYdjejs; (3GdeLGds; (3JcfhdhLjGs