Sapelnikov, V. P. (1973). Novye taksonomicheskie gruppyv otriade Pentamerida (Brakhiopody) [New taxonomic groups in the order Pentamerida (Brachiopods)]. In: Ezhegodnik, 1972. Institut Geologii i Geokhimii, Uralskiy Nauchnyy Tsentr, Akademia Nauk SSSR, Sverdlovsk. pp. 39-41.
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Sapelnikov, V. P.
1973
Novye taksonomicheskie gruppyv otriade Pentamerida (Brakhiopody) [New taxonomic groups in the order Pentamerida (Brachiopods)]. In: Ezhegodnik, 1972
Institut Geologii i Geokhimii, Uralskiy Nauchnyy Tsentr, Akademia Nauk SSSR, Sverdlovsk