I found this site, which focuses on the native peoples of the Russian Federation. Unfortunately, it hasn’t been updated since 2005, but it still looks like an excellent resource with comprehensive reading lists and references.

Check out this link to Tent Life in Siberia, a facsimile of the travelogue by George Kennan (apparently a virtual copy from Theodore Roosevelt – the man who went to China just so he could shoot a Panda – ‘s library), published in 1910.

For a more recent study I highly recommend Anna Reid’s The Shaman’s Coat, which is comprehensive and very readable, but unavoidably tragic.