Why people move : comparative perspectives on the dynamics of internal migration / ed by Jorge Balan United Nations Expert Group Meeting on Family Planning, Health, and Family Well-being (1992 : Bangalore, India) Geography -- Pictorial works. Public health HQ766 .U443 1992 325 UNW Includes bibliographical references. New York : Unesco, 1981. 1981. 1981 Text 342 p. : ng