Pedrero, M. 1968. Leo Grebler, Mexican Immigrants to the United States : The Record and its Implications. Mexican-American Study Project, Advance Report 2 Los Ángeles, University of California, 1966. xxx, 519 p. Estudios Demográficos y Urbanos. 2, 01 (ene. 1968), 111–112. DOI:https://doi.org/10.24201/edu.v2i01.65.