Ljaschenko, A. I. (1958). Brachiopods from the Lower Frasnian beds of the central part of the Russian Platform. Tr. Vsesoyuzn. Nauchno-Issled. Geol. Nedt. Inst. 9: 105-156.
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Ljaschenko, A. I.
1958
Brachiopods from the Lower Frasnian beds of the central part of the Russian Platform