North, David S. "Illegal Immigrants," Final report outlining a rationale for and a preliminary design of a study of the magnitude, distribution, flow, characteristics and impacts of illegal aliens in the United States. LCM Incorporated, circa 1975

North, David S. "Illegal Immigrants," Final report outlining a rationale for and a preliminary design of a study of the magnitude, distribution, flow, characteristics and impacts of illegal aliens in the United States. LCM Incorporated, circa 1975, Box: 189, Folder: 2. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/389508 Accessed September 27, 2026.