Biostratigrafija niznej casti ordovika Severo-Vostoka SSSR i biogeografija konca rannega ordovika = : Biostratigraphy of the Lower part of the Ordovician in the North-East of the USSR and Biogeography of the Uppermost Lower Ordovician
otvetstvennyj redaktor B.M. Keller
Bok
·
Russisk
·1973
