(3chejOjG HGi HGi YQH (B/ s - (3fHjd HOQGfs ((3GdbGgQI (B: s (3GdgjFI GdeUQjI GdYGeI ddcJGH,s, 1987)
Keywords: (3GdGOH GdYQHis; (3GdeSQMjGJ GdSjGSjIs; (3GdeSQMjGJ GdYQHjIs