Hi mortarian,
Welcome to the Aerodrome.
We recently lost a member, August G. Blume, who spent the last part of his life studying the Eastern Front of WWI. He wrote a two volume history of the Russian air service:
The Russian Military Air Fleet in World War I, Vol.1: A Chronology 1910-1917
The Russian Military Air Fleet in World War I, Vol.2: Victories, Losses, Awards
I have not read them (they are out of my budget), but Augie was the authority here on the Eastern Front.
He also had a website,
WarChron, that you might find helpful.
Steve McCarty