I suddenly find out that you guys asked about Soviet/Russian rock.
Well, I don’t know some good English sites about it (although Wikipedia has the article, and it’s not so bad).
But if you are interested, we can make a few posts on this theme. Here I post a song - one of my favorite, by Yanka Diaghileva, great musician of Soviet post-punk.
(pure underground - mostly all rock in Soviet Union was prohibited)