I was looking into the recent message here (sorry, can't find it) about a post on RRS site: www.rrs.org/2014/04/09/russian-rocket-book-design-and-engineering-of-liquid-rocket-engine relating to G. G. Gakhun's book on rocket engines. I stumbled on the site techlibrary.ru, which is a gold mine of Russian-language technical books for free download. Over 11,000 titles are available, including many physics classics like Landau & Lifshits. The problem is just that I'm not very familiar with Russian-language space-technology literature and don't know what, aside from Gakhun's book, to look for in the author-sorted collection. Would anyone who knows that literature be able to name a few of relevant classics?