(3SGYJGf ddMH (B/ s - (3chfSGdjc(B, (3gjfRs; (3eMeO YHOGdefYe LdGd (B((3eJQLe(B)s ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1992)
Keywords: (3GdGOH GdGdeGfis; (3GdbUU GdGdeGfjI GdeJQLeIs