Gerasimov, P. A. 1955. [Manual for Mesozoic fossils from the central region of the European part of the SSSR. Volume 2. Echinoidea, Arthropoda, Annelida, Bryozoa and Corals of the Jurassic Beds]. Ministry for Geology & Mining, SSSR, Moskva, 90 pp.
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Gerasimov, P. A.
1955
Manual for Mesozoic fossils from the central region of the European part of the SSSR. Volume 2
Echinoidea, Arthropoda, Annelida, Bryozoa and Corals of the Jurassic Beds]. Ministry for Geology & Mining, SSSR, Moskva