Author: Whitfield, R.P., 1892.:
Title: Gastropoda and Cephalopoda of the Raritan Clays and Greensand Marls of New Jersey.
Description: Trenton, N.Y.: J.L. Murphy [for] Geological Survey of New Jersey. 4to. Pp. 402, numerous figs. on 50 pls., index. New cloth. - This fine monograph was pubished also as "Mon. U.S. Geol. Surv." vol. 18.

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