Author: Rigby, J.K., & Potter, A.W., 1986.:
Title: Ordovician sphicrozoan sponges from the Eastern Klamath Mountains, Northern California.
Description: [Paleont. Soc. Mem., 20./ Jour. Paleont., 60(4, Suppl. II).] Tulsa, Okl. 8vo. Pp. 47, 68 photos on 5 pls., refs. Orig. wrs.

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