Author: Upson, M.E., 1933.:
Title: The Ostracoda of the Big Blue Series in Nebraska. [Nebraska Geol. Surv. Bull., Ser. 2, 8.]
Description: [Lincoln, Neb.] 8vo. Pp. 54, many microphotos on 4 pls., refs. Orig. wrs. - Lower Permian.

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