Here are some suggested words to include in your search to find primary source material:
- anecdotes/ documentary films/ personal narratives
- archives/ documentary photography/ pictorial works
- biography/ early works to 1800/ portraits
- caricature and cartoons/ interviews/ public opinion
- case studies/ manuscript/s speeches
- comic books, strips/ notebooks/ songs and music
- correspondence/ pamphlets/ sources
- description and travel/ periodicals/ statistics
- diaries/ autobiographies/ sermons /
- slave narratives/ letters/ wills
Examples of some keyword searches:
(submarine or navy or naval) and (diaries or narratives or sources) and civil war
nurses and (correspondence or diaries or sources)