Southwestern Cooperative Educational Laboratory. "Current Status of Laboratory Studies," by Paul Liberty, Robert Reeback, and Richard Thiel, circa 1967

Southwestern Cooperative Educational Laboratory. "Current Status of Laboratory Studies," by Paul Liberty, Robert Reeback, and Richard Thiel, circa 1967, Box: 201, Folder: 1. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/389835 Accessed September 26, 2026.