Sokolskaya, A. N. (1941). Lower Carboniferous and Devonian-Carboniferous brachiopods of the Moscow Basin (Tschernyschino, Upa and Malevka-Murajevnia Beds). Trudy paleont. Inst. Akad. Nauk SSSR. 12(2), 1-139, plate 1-12.
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Sokolskaya, A. N.
1941
Lower Carboniferous and Devonian-Carboniferous brachiopods of the Moscow Basin (Tschernyschino, Upa and Malevka-Murajevnia Beds)