(3eVGejf GdbVGA GdHOhj bHd GdYgO GdSYhOj (B/s - (3GdLhOj, UGdM Hf ZGRj,s 1372 (3g`(B-s ([(3GdWGFa, GdSYhOjI(B] :s (3fGOj GdWGFa GdCOHj,s, 1991)
(3HHdjhLQGajI (B: (3U(B. 237-247.s
Keywords: (3GdbVGA GdbHdjs -- (3GdSYhOjIs -- (3JGQjNs