(3BQGA aj GdTQjYI haj GdMQjI (B/ s - (3LeGd GdYWjajs ((3GdbGgQI (B:s (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1980)
(3jTJed Ydi EQLGYGJ HdjhLQGajIs
Keywords: (3GdbGfhf GdOSJhQjs