(3LdGd GdOjf GdQhej Hjf GdUhajI h YdeGA GdcdGe (B/ s - (3CHdGZ GdEaZGfj, YfGjI Gddgs ((3GdbGgQI (B:s (3GdOGQ GdeUQjI GddHfGfjI,s, 1987)
Keywords: (3GdJUhas; (3GdadSaI GdESdGejIs