A primary source is direct evidence or firsthand testimony of an event or time period. Letters, manuscripts, journals, newspapers, speeches, interviews, memoirs, photos and videos, data, and physical objects are all examples of potential primary sources.
Watch this video for a brief overview:
In the Library Catalog, use the Advanced Search to search Subject contains "sources" and your topic.
In Google, search for "primary sources" and your topic.
You could also try "primary documents" or "digital collection" or "digital library" in addition to "primary sources".
Search Tip:
Use words that would have been used during the time period you're researching. For example, African American was not always used. The language in documents in previous times may have included Negro, slave or black.