Hello hello!! There's some notes for Hoover in the resources section for history in the USA part, just ctrl+F "Hoover". There's a particularly good one that's made in 2004 that covers almost everything you need to know for Hoover (it covers the USA section early on so you can just skip that part, it's 23 pages long). I'm doing Hoover as well so if you need anything I'll try and help you out.