Author: Harriso, R.W., 1957/:
Title: Ostracoda of the Simpson Group [Ordovician]. [Oklahoma Geol. Surv. Bull., 75.]
Description: Norman, Okl. 8vo. Pp. vi,333, 2 fold. diagrs. in pocket, 10 plates, 2 fold. sections, 18 figs., bibliogr., index. Orig. wrappers.

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