(3cja fYde GdGHfGA Yf GdLfS (B/s - (3SgjQ MHjHs ((3GdbGgQI (B:s (3OGQ GdKbGaI ,s, 1989)
Keywords: (3GdJQHjI GdLfSjIs; (3GdGWaGds -- (3GdSdhc GdLfSis; (3GdeQGgbhfs -- (3GdSdhc GdLfSis