Latin American & Mexican American Collections at Stanford University 

The title-hyperlinks from the above guide point to the archives' finding aid from the Online Archive of California (OAC) and the number in parenthesis are the archives' call numbers as identified in the SearchWorks catalog where Special Collections' materials can be requested for consultation in the Field Reading Room in Green Library, Monday to Friday, from 9a.m. to 5p.m. Here is a link to a video where you can learn the basics about primary sources at Stanford.