Don't forget that magazines, literary & art journals, film, books and more can be primary sources too (see tutorial for explanation). Use those resources as well.
Primary sources were created at the time of an event or period. They are often the product of an eyewitness or an original creator. They might be original reports of an event, artifacts from an event or time period, or creative works, and include:
Secondary sources interpret, analyze, or contextualize primary sources. They are second-hand interpretations. They might include:
Add Primary Source Keywords to Your Search Terms
gay men and (letters or correspondence or diaries)