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Gordon, M.J. and Yochelson, E.L. (1983). A gastropod fauna from the Cravenoceras hesperium ammonoid zone (Upper Mississippian) in East-central Nevada. Journal of Paleontology. 57: 971–991.
Gordon, M.J. and Yochelson, E.L. (1983). A gastropod fauna from the Cravenoceras hesperium ammonoid zone (Upper Mississippian) in East-central Nevada. Journal of Paleontology. 57: 971–991.
