1. Conodonts from subsurface Champlainian (Ordovician) rocks of eastern Indiana Author/Creator: Ethington, Raymond Lindsay, 1929- Publication/Creation: Bloomington, Ind. : Indiana Department of Natural Resources, Geological Survey, 1986 Resource Type: Book Access & Availability: Loading
2. Conodonts of the Trenton group (Ordovician) in New York, Southern Ontario, and Quebec Author/Creator: Schopf, Thomas J. M. Publication/Creation: Albany : University of the State of New York, 1966 Resource Type: Book Is Part Of: Museum bulletin (New York State Museum), no. 402-407. Access & Availability: Loading