YAP Lorene Y L Internal migration in less developed countries YAP Lorene Y L - Washington IBRD 1975 - 47p cm. - "International Bank for Reconstruction and Development, Publication. World Bank Staff, Working Paper.215" . Bibliography: p 41-47 Standard No.: 89788 Source: Reference Collections Subjects--Topical Terms: Migration Dewey Class. No.: "Y:582.1.N7, L5/UN"