Nazarov, B. B.; Popov, L. E. (1980). Stratigrafiya i fauna kremnisto-karbonatnykh otlozhenij Kazakhstana (Stratigraphy and fauna of Ordovician siliceous-carbonate deposits of Kazakhstan). Geologicheskiy Instituta Akademii Nauk SSSR, Trudy. 331: 1-190, 32 pls.
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Nazarov, B. B.; Popov, L. E.
1980
Stratigrafiya i fauna kremnisto-karbonatnykh otlozhenij Kazakhstana (Stratigraphy and fauna of Ordovician siliceous-carbonate deposits of Kazakhstan)
Geologicheskiy Instituta Akademii Nauk SSSR, Trudy