Ugh, I was born in 68 and I always advocate for doing some research in libraries. The important factor is the serendipity of finding random stuff as you walk around and the narrowed part when you get to your target's area on the shelves and seeing other volumes in the same subject area.

I'm much younger than you, but I had the experience of having a difficult-to-find-info-on-the-internet subject for a high school paper, and the opporunity to researching the subject at a well stocked library. There was a lot of friction to the process that I wasn't used to, but the serendipity aspect was absolutely revelatory. There is something fundamentally unfiltered about walking past shelves of books with titles on subjects you never even knew existed.