(3GdMQH hGdSdGe GdbUI GdNGdOI (B((3GdcJGH GdKGfi(B) / s - (3GOhGQ GdNQGWs; (3JhdSJhi, djhs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1991)
Keywords: (3GdGOH GdQhSis; (3GdbUU GdQhSjI GdeJQLeIs