Digitized primary source materials from UT-Arlington Library. From the website: "Given the archive's strengths in U.S. and Mexican materials, UT Arlington is uniquely positioned to take on this project. Though fought entirely on soil claimed by Mexico, the war remains very much an American story for historians in the United States. This website, as its title suggests, seeks to address this imbalance, adopting a binational focus to examine the war as part of a larger and more integrated North American narrative." There are materials for researchers, students, and educators.
Over 100 videos including El Teatro Campesino plays, television specials, concerts, interviews, news footage, commercials, and workshops. The series includes the first known film that has a segment about the Teatro, "Huelga," narrated by Cesar Chavez. Some are available online (and are clearly linked); others are in the California Ethnic and Multicultural Archives at the University of California, Santa Barbara.
Researchers can start on that main page or go directly to the Data tab to get statistics. It is interesting to note that the US Government is re-evaluating how to determine Hispanic Origin and other ethnicities (see this Pew Report and this New York Times article for more information).