(3GdKhe GdSGMQ (B: s (3OhGA WHjYj aj ehGLgI CeQGV GdYUQ (B/ s - (3GdMSjfj, Cjefs ((3GdbGgQg (B:s (3ecJHI EHf SjfG,s, 1991)
Keywords: (3GdWH GdTYHjs; (3GdKhes