Notes on the Correlation of Russian and Midcontinent Carboniferous and Permian Ammonite Zones

Frederick Byron Plummer; Carl O. Dunbar; M. K. Miller

doi:10.2475/ajs.s5-33.198.462

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Plummer, F. B., Dunbar, C. O., & Miller, M. K. (1937). Notes on the Correlation of Russian and Midcontinent Carboniferous and Permian Ammonite Zones. American Journal of Science, s5-33(198), 462–472. https://doi.org/10.2475/ajs.s5-33.198.462

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