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Helmersen 1872–English. The naming of the Permian System

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journal contribution
posted on 13.05.2021, 14:26 by Michael J. Benton, Andrey G. Sennikov
English translation of Helmersen, G.P. 1872. Sir Roderick Impey Murchison: [Obituary]. Gorniy Zhurnal, 1872(2), 340–352.

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