Cesar Chavez/UFW, 1968-1974. Selections from the extensive Bob Fitch photography archive dealing with Chicano civil rights activist Cesar Chavez and the United Farm Workers (UFW.) 

David Bacon Photo Archive: Work and Social Justice.  One of the Stanford Libraries’ largest collections of documentary photography. With a focus on labor and social justice it is a primary resource encompassing some 200,000 images and including original film negatives, color transparencies, selected prints, and digital files.