Materials in the library's catalog are assigned controlled subject terms, usually from Library of Congress Subject Headings, to define precisely what the work is about.
While there are easily over a hundred LC Subject Headings relevant to LGBTQIA+ topics, most of them include common words, and so we can instead search just for works that include any of 20 different terms.
Dozens, at least, of government documents in our collection are on LGBTQIA topics, but our Government Documents Librarian should be able to help you find more.
We have in our archives at least eight masters theses on LGBTQIA topics produced by WT graduate students. The most recent such theses can also be read online.