To find books, DVDs, maps, sound recordings, manuscripts, and much more - everything except articles - use a library catalog.
OskiCat = most UC Berkeley libraries
MELVYL = all UC campus libraries, including all UC Berkeley libraries
What's the difference? more details here
For each item make sure you know the name of the physical library, call number, and whether or not it's checked out, library use only, etc.
Examples of searches in OskiCat or MELVYL:
keywords: united farm workers
migrant agricultural labor* united states
migrant agricultural labor* california
alien labor mexican
* = truncation/wildcard symbol (immigra* = immigrant, immigrants, immigration, immigrating, etc.)
limit as needed by format (ex: DVD, sound recording, manuscript), language, etc.
author: united farm workers (to retrieve materials created by the UFW)
author: chavez, cesar