The Polish publisher Ajaks has a good book - Mariusz Skotnicki's "Vehicles of the Polish Armed Forces Eastern Front 1943-1945." It's completely bilingual, not just the photo captions and even has a short article about the controversy of tactical numbers. Lots of photos of LWP tanks. Ajaks also publishes a series called "T-34 in Combat." Vol. 2 has a good article by Zbigniew Lalek but it only covers the earlier service of the T34/76 in the Polish Army. Vol. 3 focuses on the T34/85 but doesn't have too many details or photos of Polish T34/85 during WW2. It does have some interesting pics of post war tanks in the 1960's. There is quite a bit in Michulec's and Zientarzewski's "T34-Mityczna Bron Vol. 2" on Polish T34/85 but the whole book is in Polish. Someone posted that Airconnection in Canada has been working on an English version but that has been a while ago. Excellent source if you can understand Polish.
An easier solution could be Armo's decals. They make a sheet of LWP vehicles that includes seven different T34/85's. You can find a scan of the sheet here:
http://www.jadar.com.pl/armo/35401/35401.htm
I build 1/72 and have used many of their sheets. Decals are really thin and disappear with some clear gloss and Solvaset. I'm sure the 1/35th are just as good.
Hope it helps,
Jeff