1. Early Pennsylvanian ammonoids from southern Nevada Author/Creator: Gordon, Mackenzie, 1913- Publication/Creation: Washington : U.S. Govt. Print. Off, 1969 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 611-614. Access & Availability: Loading
2. An early Reticuloceras Zone fauna from the Hale Formation in northwestern Arkansas Author/Creator: Gordon, Mackenzie, 1913- Publication/Creation: Washington : U.S. Govt. Print. Off, 1968 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 611-614. Access & Availability: Loading
3. Evidence for hot Mississippi Valley-type brines in the Reelfoot rift complex, south-central United States, in Late Pennsylvanian-Early Permian Publication/Creation: Washington : U.S. G.P.O., 1998 Resource Type: Book Access & Availability: Loading