(3QSGdI GdJhGHY hGdRhGHYs - (3GdGfOdSj(B. (3GHf TgjOs ((3OGQ UGOQs (3HjQhJs, 1980)
Keywords: (3GdQSGFd GdYQHjIs; (3GdGOH GdYQHj(B- (3efhYGJs