Biostratigraficheskie i Paleobiofalsialnie Issledovaniya i ikh Prakticheskoe Znachenie [Biostratigraphical and Paleobiofacial Investigations and their practical significance]

Stratigraficheskoe Znachenie Krinoidei v Voprosy Granitsy Silura i Devona [Stratigraphical significance of crinoids and questions on the boundary Silurian and Devonian] - 1970