(3GddZI GdGcOjI(B:s (3GdHGHdjI (B- (3GdGThQjI(B: (3JGQjNgG hJOhjfgG hbhGYOgG(B/s - (3SdjeGf,YGeQs ((3GdehUd (B[(3GdYQGb(B]:s (3OGQ GdcJH ddWHGYI hGdfTQ,s, 1991)
Keywords: (3GddZI GdGThQjI s