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The ammonoid genus Spiroceras (Spiroceratidae, Ammonoidea) from the Upper Bajocian of the Northern Caucasus

Crossref DOI link: https://doi.org/10.1134/S0031030117020101

Published Online: 2017-04-04

Published Print: 2017-03

Update policy: https://doi.org/10.1007/springer_crossmark_policy

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