The upper cambrian of the chopko river section, norilsk region, northwestern siberian platform: Stratigraphy and trilobites A. I. VarlamovK. L. PakA. V. Rosova OriginalPaper Pages: S1 - S56
New upper cambrian trilobites from the chopko river section A. I. VarlamovK. L. PakA. V. Rosova OriginalPaper Pages: S57 - S89