I'm looking for books (or papers) on space exploration and development of spaceflight, especially earlier (lets say pre-1980) , preferably about Russian and other countries space programs (American is pretty well documented, even with easily accessible and well known sources, although if you have a good book on this topic I'd like to check it out as well). I have pretty good knowledge about "basics", I'm looking for something more in-depth, and I've got pretty good understanding of engineering and physics concepts regarding spaceflight, so even more technical readings are welcome. Sadly, recommended book section has nothing on this topic, and my local library just ran out of titles I haven't read yet.