Many primary sources are published and cataloged just like books. So just use the library’s catalog or the OhioLINK catalog. Some ways to help find those are:
- Identify key players and search for them as authors. This will find papers, correspondence, memoirs, etc. Remember that government agencies and corporations may also be authors.
- Do a keyword search using your topic and the words sources, diaries, letters, or correspondence (e.g. Great Britain and history and sources)