California has a long and complicated history with laborers, and the Bracero Program is no exception. Try a few searches in the suggested databases or read some of the suggested articles to find out more about this program and its effects.
If you'd like to find out more about the Bracero Program, try looking at these databases.
Here is a sampling of the many articles that you can find in the databases listed under "Suggested Databases" on the left side of this page.