1. Calloway Creek limestone and Ashlock and Drakes formations (Upper Ordovician) in south-central Kentucky Author/Creator: Weir, Gordon W. 1922-2011, (Gordon Whitney), author Publication/Creation: [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1965 Resource Type: Book Access & Availability: Loading
2. Clays Ferry formation (Ordovician) -- a new map unit in south-central Kentucky Author/Creator: Weir, Gordon W. 1922-2011, (Gordon Whitney), author Publication/Creation: [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1965 Resource Type: Book Access & Availability: Loading
3. Calloway Creek limestone and Ashlock and Drakes Formations (Upper Ordovician) in south-central Kentucky Author/Creator: Weir, Gordon W. 1922-2011. (Gordon Whitney) Publication/Creation: Washington : U.S. Govt. Print. Off, 1965 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1223-1224. Access & Availability: Loading
4. Clays Ferry Formation (Ordovician) : a new map unit in south-central Kentucky Author/Creator: Weir, Gordon W. 1922-2011. (Gordon Whitney) Publication/Creation: Washington : U.S. Govt. Print. Off, 1965 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1223-1224. Access & Availability: Loading