It's important to experiment with different keyword combinations to harvest the most relevant results. Try synonyms and variations. Every resource uses different language! Here are a few example search terms you might employ.
Defense of Marriage Act
equal access to marriage
Don't Ask Don't Tell
This guide is a collection of resources and strategies that will assist with research of LGBTQ issues as they relate to the law. Relevant topics might include discrimination in the military, bathroom bills, same-sex marriage, employment discrimination based on sexual preference, etc. The information and links presented here provide a foundation for further exploration. This guide is broad in scope and may be applied to various aspects of LGBTQ law. Please consider this guide a place to start, but if you have questions about a specific topic or an angle that is not addressed here, do not hesitate to reach out to a librarian.