Title: Shestoĭ sʺezd RSDRP(b)
Subjects: Sʺezd RSDRP(b) (6th : 1917 : Petrograd, R.S.F.S.R.), Sʺezd RSDRP(b) (6th : 1917 : Petrograd, R.S.F.S.R.) http://id.loc.gov/authorities/names/n85256714, Sʺezd RSDRP(b (6th : 1917 : Petrograd, R.S.F.S.R.)