(3CReI GdOjebQGWjI aj GdhWf GdYQHj (B/s - (3GHQGgje, SYO GdOjf s ([(3Ohf ecGf(B] :s (3eQcR OQGSGJ GdhMOI GdYQHjI ,s, 1987)
Keywords: (3GdhWfs; (3CReI s; (3GdOjebQGWjIs; (3GdYQHj s