Sun Guang Zhen Ed. Readings in the economics of the division of labor Sun Guang Zhen Ed. - New Jersey World Sceintific Publishing Company 2005 - xiii,294p cm. - Increasing Returns and Infra-marginal Economics. V2 . ISBN: 9812561242 Source: General Book Subjects--Topical Terms: Labour Economics Dewey Class. No.: X:9, P5