Thesis report on biostratigraphy of the boundary layers of the Lower and Middle Devonian of the USSR with field sessions of the International Commission on Stratigraphy of the Devonian (15-25 August)]

O zonalnom raschlenenii i korrelyatsii nizhnego i srednego devona SSSR po krinoideyam. V kn. Tezici soobshchenii po biostratigrafii pogranichnikh sloev nizhnego i srednego devona SSSR na polevoi sessi Mezhdunarocnoi podkomissii po stratigrafii devona (15-25 avgusta 1978) [On zonal breakdown and correlation of Lower and Middle Devonian of the USSR according to crinoids - 1978