Kalinin K4

[maxmwill]

I've been trying to reasearch the Kalinin K4 for a scratch build project(1/48 scale), and have found a few references about it being used as a flying ambulance during the Russo-Finnish Winter War. While I can find more than a few photos of it with the BMW IV, the other version had the M6, which was the license built Hispano Suiza 8F, which I'd like to build as a model, and if I can find a few pics of it with that, then I'll be able to start drafting(I like that better than CAD). Is there a book on the Winter War? I don't care if it is in Russian, because while using a dictionary to help translate is fine and dandy, photos need no translation