Authors: KOREN Tatiana N. GOSHENINA Vera TOLMACHEVA Tatiana

Citation: N. Koren Tatiana et al., Volkhov graptolites form the Lower-Middle Ordovician boundary beds of the St.Petersburg region Russia, Palaontologische Zeitschrift Palaontologische Zeitschrift (Print);Journal of Palaontologische Gesellschaft Scientific contributions to palaeontology, 78(1), 2004, pp. 195-212