(3GdKbGaI h GdeLJeY (B:s (3GdGfJQhHhLjG GdKbGaI h GdHMK GdejOGfj (B/s - (3ZGeQj , eMeO MSf s ((3GdLRGFQ (B:s (3OjhGf GdeWHhYGJ GdLGeYjI ,s, 1989)
Keywords: (3GdeLJeY s; (3GdGfJQhHhLjG s; (3GdKbGaI s; (3GdKbGaI s