CALERO, R.; HERNÁNDEZ, M. I.; MULER, L.; SERRA, G. Natural Increase and Net Migration of Coffee Region Populations in Puerto Rico, 1960-70. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 55, n. 4, p. 387–393, 1971. DOI: 10.46429/jaupr.v55i4.11002. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/11002. Acesso em: 28 jan. 2023.