Portes, Alejandro, and Robert L. Bach. "Dual Labor Markets and Immigration: A Test of Competing Theories of Income Inequality." Comparative Studies of Immigration and Ethnicity Occasional Papers Series, Center for International Studies, Duke University, 1979

Portes, Alejandro, and Robert L. Bach. "Dual Labor Markets and Immigration: A Test of Competing Theories of Income Inequality." Comparative Studies of Immigration and Ethnicity Occasional Papers Series, Center for International Studies, Duke University, 1979, Box: 191, Folder: 23. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/389605 Accessed September 27, 2026.