The Boston Public Library (USA) has digitised its collection of legacy vinyl (crackle and hiss and all) at the Internet Archive, and it's the absolute epitome of a 50s–70s library record collection.
https://archive.org/details/vinyl_bostonpubliclibrary
Internet Archive: Digital Library of Free & Borrowable Books, Movies, Music & Wayback Machine

@AKMA Me leafing through the list "Oh wow, I wanna listen to that. OMG, I wanna listen to that first! Wait, I wanna listen to THAT..."
@Sedunker Sadly, some of the best choices are just 30-second clips…