This collection is part of the José F. Treviño Chicano/Latino Activism Collection. Item, Folder number and/or title, Box number, John J. Castillo papers, MSS 540, Special Collections, MSU Libraries, Michigan State University, East Lansing, MI. https://findingaids.lib.msu.edu/repositories/4/resources/6091 Accessed December 09, 2025.