(3hba JfajP GdbQGQ GdGOGQi hGMcGe GdbVGAGdGOGQi (B/ s - (3YHOGdZfi HSjhfi YHOGddgs ([S.N] : (3efTGI GdeYGQa GdGSdGejI , s, 1991)
Keywords: (3GdbGfhfs; (3GdbGfhf GdeOfis; (3GdbVGA GdGOGQjs