Betekhtina, O. A. (1966). Verkhnepaleozoiskie nemorskie peletsipody (dvustvorki) Sibiri i vostochnogo Kazakhstana [Upper Paleozoic non-marine Pelecypoda (bivalves) of Siberia and eastern Kazakhstan]. Nauka, Moskva, 220 pp.
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Betekhtina, O. A.
1966
Verkhnepaleozoiskie nemorskie peletsipody (dvustvorki) Sibiri i vostochnogo Kazakhstana [Upper Paleozoic non-marine Pelecypoda (bivalves) of Siberia and eastern Kazakhstan]