On Marx's concept of labor and its contemporary significance 并列题名：On Marx's concept of labor and its contemporary significance On Marxist Communication Theory and It's Contemporary Significance Marx's world market theory and its contemporary significance Marxist theory on poverty and its contemporary significance 并列题名：Marxist theory on poverty and its contemporary significance Marx's view of labor and its contemporary value 并列题名：Marx's view of labor and its contemporary value Democratic experiment of paris commune and its contemporary significance Ecological philosophy in Capital and its contemporary significance