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Krasilova, I. N. (1963). Stratigrafiya i peletsipody verkhov silura i nizhnego devona severo-vostochnogo Pribalkhash'ya [Stratigraphy and pelecypods of the Upper Silurian and Lower Devonian of the north-eastern Balkhash region]. Trudy Geologicheskogo Instituta Akademii Nauk SSSR. 75: 1-202, 14 pls.
Krasilova, I. N. (1963). Stratigrafiya i peletsipody verkhov silura i nizhnego devona severo-vostochnogo Pribalkhash'ya [Stratigraphy and pelecypods of the Upper Silurian and Lower Devonian of the north-eastern Balkhash region]. Trudy Geologicheskogo Instituta Akademii Nauk SSSR. 75: 1-202, 14 pls.