1. Regional stratigraphic cross sections of Cretaceous rocks from east-central Arizona to the Oklahoma Panhandle Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, Va.] : The Survey, 2001 Resource Type: Map Edition: Version 1.0, last modified 5 Dec. 2001. Access & Availability: Loading
2. Raleigh/Durham Publication/Creation: [S.l.] : Maps.com, c2001 Resource Type: Map Access & Availability: Loading
3. Reader's Digest Bartholomew illustrated atlas of the world Author/Creator: Reader's Digest Association Publication/Creation: Pleasantville, N.Y. : Reader's Digest, 2001 Resource Type: Map Edition: 4th. revised edition. Access & Availability: Loading