Whitfield R.P. (1892). Gastropoda and Cephalopoda of the Raritan Clays and Greensand Marls of New Jersey. United States Geological Survey Monograph. 18: 1-402, 50 pls.
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Whitfield R.P.
1892
Gastropoda and Cephalopoda of the Raritan Clays and Greensand Marls of New Jersey