Primary resources provide firsthand evidence of historical events. They are generally unpublished materials such as manuscripts, photographs, maps, artifacts, audio and video recordings, films, oral histories, postcards, and posters. In some instances, published materials can also be viewed as primary materials for the period in which they were created. In contrast, secondary resources, such as textbooks, synthesize, analyze, and interpret primary materials.
Check out the Library of Congress Primary Source Analysis Tools by material type to see the kinds of questions you should be asking when looking at primary sources.
And remember, you will usually find primary resources in archives and special collections. At UCLA, you should check out Library Special Collections, the Center for Oral History Research, and the Ethnomusicology Archive, among others.