I am currently looking for information on Russian Heavy Artillery, I have looked high and low, all over the net, book stores, And I can only find a small handfull of information. I would appreciate any help.
Depending on what you're after, there are a few online photo albums of Russian artillery museums, e.g. this one has numerous photos of a 12" mortar and a 12" railway gun from the Great War:
http://rkkaww2.armchairgeneral.com/galleries/artillery/305mmM1915pic2.jpg Cool photo. BTW, barrel of that gun we have in Warsaw Museum of Polish Army. G.