(3JhXja CLgRI GdEJUGd GdJYdjejI aj GdJfejI GdQjajI GdeJcGedI h GdJQHjI GdScGfjI (B/ s - (3GdjhfSchs ((3YeGf (B:s (3GdjhfSch,s, 1992)
Keywords: (3GdhSGFd GdJYdjejIs; (3GdJOQjSs; (3GdeLJeY GdQYhjs