Skip to Main Content

Primary Sources

What are Primary Sources?

See also History, Images, News & Newspapers, U.S. Government Publications
Primary sources are materials that provide first-hand documentation or knowledge, usually of people, places, events or time periods. Primary sources enable the researcher to trace a research subject to its origin, potentially supporting new interpretations or revealing previously undocumented knowledge of that subject. Just a few examples of primary sources include diaries, oral histories, fossils, DNA, correspondence, speeches, interviews, court cases, or scientific studies. Secondary sources build upon or extrapolate information derived from primary sources, and the distinction between the two can be quite fluid depending on one's area of study. In most contexts, however, a primary source is understood to be a point of origin, or a piece of raw data, for a research subject.

Featured resource

Going to the Sources: A Guide to Historical Research and Writing (Online access)

Research assistance

Research Desk
Location: 1st Floor Library Addition 
Phone: (619) 594-6728
eref AT sdsu DOT edu
Special Collections & University Archives
Location: 1st Floor Love Library
Phone: (619) 594-6791
askscua AT sdsu DOT edu