Primary sources are generally defined as first-hand accounts of an event and are an original work, not derived from other sources. They may be first-person accounts, such as diaries, letters, or correspondence, as well as interviews, official government records, or court documents. Visual records, such as paintings or photographs, as well as films, television programs, and even advertisements may be considered primary sources.
Look for primary sources in ThomCat [or any library catalog] by using the following keywords in combination with other search terms relevant to your topic:
Combine these terms with your topic keywords and search. Example: Camus AND correspondence