Ehrlich, Howard J. "Instrument Error and the Study of Prejudice." From Social Forces, undated

Ehrlich, Howard J. "Instrument Error and the Study of Prejudice." From Social Forces, undated, Box: 167, Folder: 10. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/388954 Accessed September 27, 2026.