Human development report, 2009 : overcoming barriers : human mobility and development / United Nations Development Programme (UNDP). United Nations Development Programme (UNDP). Human resources policy. Economic development Social aspects. 331.11 UNH Bibliography: p. 119-139 Includes bibliographical references New York : United Nations Development Programme (UNDP), 2009. 2009. 2009 Text xiii, 217 p. : ill. (some col.), col. maps ; 28 cm. eng