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Sachs V.N., Nalnyaeva T.I. (1975). Ранне- и среднеюрские белемниты севера СССР. Megateuthinae и Pseudodicoelitinae [= Early and Middle Jurassic belemnites of the northern SSSR. Megateuthinae and Pseudodicoelitinae]. Trudy Instituta Geologii i Geofiziki, Akad. Nauk SSSR, Sibirskoe Otdelenie. 239: 1-192.
Sachs V.N., Nalnyaeva T.I. (1975). Ранне- и среднеюрские белемниты севера СССР. Megateuthinae и Pseudodicoelitinae [= Early and Middle Jurassic belemnites of the northern SSSR. Megateuthinae and Pseudodicoelitinae]. Trudy Instituta Geologii i Geofiziki, Akad. Nauk SSSR, Sibirskoe Otdelenie. 239: 1-192.
