PEÑA, R. de la. Joan M. Nelson, Migrants, Urban Poverty, and Instability in Developing Nations, Occasional Papers in International Affairs, no. 22, Cambridge, Harvard University, 1969. 81 p. Estudios Demográficos y Urbanos, [S. l.], v. 5, n. 03, p. 384–385, 1971. DOI: 10.24201/edu.v5i03.118. Disponível em: https://estudiosdemograficosyurbanos.colmex.mx/index.php/edu/article/view/118. Acesso em: 29 mar. 2024.