Tim, hi,
very interesting topic! Here's a link to the photos of Prokudin-Gorsky & individual provinces of Russia & Ukraine: Ruthenia and Hutsulshchyna(Hutsuls):

http://samoderzhavnaya.ru/pages/fotografii_prokudina_gorskogo
http://www.veinik.by/
https://www.youtube.com/watch?v=D7mP2lvO1Dk