Use the library search tool Primo to find books that contain primary source material. A search that combines your topic's keyword with subjects that pertain to primary sources can be an effective search strategy.
For example:
Subjects pertaining to primary sources: Sources, Diaries, Archives, Narratives, Interviews, Quotations, Correspondence, Pamphlets, Speeches, Statues
Combine topic keyword with subject : "slavery" + "interviews", "women's suffrage" + "pamphlets", "Nero" + "statue", "American revolution" + "speeches"