The San Joaquin Valley Farm Labor collection measures 2 linear feet and dates from 1947 to 1971. The collection is arranged in five series: Yinger bibliography; Office of Economic Opportnity (OEC) War on Poverty; Chavez, Cesar; Strike and boycott against grapes.

Agricultural production found a prosperous home in the heart of the San Joaquin Valley. The valley's fertile soil and climate made it a million-dollar industry. Of vital importance was also the cheap labor provided by incoming immigrants who were willing to work for low wages. Although immigrants of every ethnicity were working in the fields in the 1960s, the majority were Filipinos and people of Mexican descent. In 1965 a strike by the Agricultural Workers Organizing Committee (AWOC) led by Larry Itliong was joined by the National Farm Workers Association (NFWA) led by Cesar Chavez. This began the fight for justice for the farm worker through agricultural unionism.

The collection is open for research.