(3GdhSjW aj GdSjQI GdfHhjI hGdNdGaI GdQGTOI (B:s - (3GdedGM ,gGTe jMji s ((3ehUd (B:s (3eWHYI LGeYI GdehUd ,s, 1991)
Keywords: (3GdYGde GdYQHj (B-(3JGQjN (B-(3YUQ GdNdaGA GdQGTOjfs