-Farmworker Movement Documentation Project
https://libraries.ucsd.edu/farmworkermovement/archives/
-Border Patrol Oral Histories
https://oralhistory.unt.edu/subjects/border-patrol
https://www.borderpatrolmuseum.com/oral-history-interviews/
-Bracero Archive
http://braceroarchive.org
-Bracero Oral History Project (contains transcripts of many interviews that are only available as sound files in the Bracero Archive)
https://scholarworks.utep.edu/bracero/
-El Teatro Campesino Video Archive
http://cemaweb.library.ucsb.edu/theater.html
-Online Archive of California: https://oac.cdlib.org
This allows you to do global searches of research libraries in California. You can narrow your search to digital materials. They have material ranging from images from the Royal Chicano Air Force Archives to videos from Teatro Campesino
-Primary sources from Miriam Pawel’s website accompanying her book The Union of Their Dreams
http://unionoftheirdreams.com/Primary_Sources.php
Welga Digital Archive, Bulosan Center for Filipino Studies, UC Davis
https://welgadigitalarchive.omeka.net/
-Memoirs, oral histories, poetry, and other published book-length primary sources in Franklin
Carlos Bulosan, America is in the Heart
Carey McWilliams, Factories in the Field
LeRoy Chatfield, To Serve the People
Craig Sharlin, Lilia Villanueva, and Elaine H. Kim, Philip Vera Cruz
Manuel Buaken, I Have Lived with the American People
Dorothy Ray Healey, California Red
Ernesto Galarza, Barrio Boy
Ernesto Galarza, Merchants of Labor
Ernesto Galarza, Farm Workers and Agri-business in California
Ernesto Galarza, Kodachromes in Rhyme
Ernesto Galarza, Man of Fire
Ernesto Galarza, Spiders in the House and Workers in the Field
Ernesto Galarza, Labor in Latin America
Ernesto Galarza, Strangers in our Fields
(Ernesto Galarza was a prolific author, and students can explore his other writings, as well)
Robert J. Jensen and John C. Hammerback, eds., The Words of Cesar Chavez
Rolas de Aztlán: Songs of the Chicano Movement [sound recording]
Eyewitness: A Filmmaker's Memoir of the Chicano Movement [film]
-The US National Archives contains material on literally everything -- the problem is that the catalog is not well organized. But you can search for anything and find digitized documents here.
https://catalog.archives.gov/advancedsearch
-The Library of Congress also has a huge variety of digitized archival material, including Voices of the Dustbowl (migrant worker materials, 1940-1941)
https://www.loc.gov/collections/todd-and-sonkin-migrant-workers-from-1940-to-1941/about-this-collection/