Calero R, Hernández MI, Muler L, Serra G. Natural Increase and Net Migration of Coffee Region Populations in Puerto Rico, 1960-70. JAUPR [Internet]. 1971 Oct. 1 [cited 2024 Apr. 26];55(4):387-93. Available from: https://revistas.upr.edu/index.php/jaupr/article/view/11002