Mary M. Kritz, Charles B. Keely, Silvano M. Tomas (comps.). Global trends in migration: theory and research on international population movements. New York, N.Y. : The Center for Migration Studies, 1981. 433 p.
Autores:Gustavo Félix Verduzco, Mary M. Kritz, Charles B. Keely, Silvano M. Tomasi