UC Law SF Library offers extensive resources for research on Critical Race Theory, including print & e-books. If you do not see the books that you need, you can borrow books from other institutions via interlibrary loans.
Here are some searches that you may want to try using in various databases. Following the links takes you to that search in the UC Law SF catalog. Use filters and additional search terms to refine your search:
This Cornell University collection is a digital library of primary sources in American social history from the antebellum period through reconstruction (approximately 1830-1900). The collection is particularly strong in the subject areas of education, psychology, American history, sociology, religion, and science and technology. This site provides access to 267 monograph volumes and over 100,000 journal articles with 19th century imprints.