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Maslennikov, D. F. (1935). Verkhne-permskiye plastinchatozhabernyye severnogo kraya [The Upper Permian pelecypods of the northern region]. Trudy Tsentral'nogo nauchno-issledovatel'skogo geologo-razvedochnogo instituta (TsNIGRI). 29: 1-124, pls. 1-6.
Maslennikov, D. F. (1935). Verkhne-permskiye plastinchatozhabernyye severnogo kraya [The Upper Permian pelecypods of the northern region]. Trudy Tsentral'nogo nauchno-issledovatel'skogo geologo-razvedochnogo instituta (TsNIGRI). 29: 1-124, pls. 1-6.
