(3GHf SjfG Gdedc(B:s (3MjGJg hTYQg(B/s ((3GdbGgQI, eUQ(B:s (3OGQ GdcJGH GdYQHj ddWHGYIhGdfTQ,s, 1968)
Keywords: (3GdTYQ GdYQHjs -- (3JGQjNs -- (3GdYUQ GdYHGSjs