(3YdeGA GdJLOjO ai GdGSdGe MJi GdbQf GdMGOi YTQ ddgLQI (B/ s - (3YHOGdMejO UGdM MeOGfs ([S.N] : (3GdOGQ GdeUQjI GddHfGfjI , s, 1989)
Keywords: (3GdGSdGes; (3GdYdeGA GdeSdehfs; (3MQcGJ GdGUdGM hGdJLOjOs