(3GdehGYX hGdeLGdS (B/s - (3GHf GdLhRj, YHO GdQMef Hf Ydj Hf eMeOs 508-597 (3gLQjs; (3SfHd, eMeO EHQGgjes ((3WfWG(B- (3eUQ(B:s (3OGQ GdUMGHI ddJQGK,s, 1990)
Keywords: (3GdOYhI GdESdGejIs; (3GdhYX hGdEQTGOs