(3JWhQ GdWHbI GdYGedI aj GdQCSeGdjI GddHfGfjI GdeYGUQI (B/s - (3Ydj, TGejs ((3HjQhJ (B:s (3OGQ GdaGQGHj ,s, 1981)
Keywords: (3GdQCSeGdjI GddHfGfjI s; (3GdWHbI GdYGedI s