[Juha]

Hello Neil, a clarification.
Keskinen - Partonen - Stenman Suomen Ilmavoimat Finnish Air Force 1928 – 40 see things from Finnish POV as the title shows and the Soviet losses shown are those which are found to match to FAF claims. On the other hand is Geust - Tirkeltaub - Petrov Red Star 5 Baltic Fleet Air Force in Winter War Itämeren laivaston ilmavoimat Talvisodassa see things from VVS-KBF POV and there are appendices from which You can see the VVS-KBF losses easily and of course can find more info from text.

HTH
Juha