Title
Pennsylvanian and Early Permian paleogeography of the Uinta-Piceance Basin region, northwestern Colorado and northeastern Utah / by Samuel Y. Johnson, Marjorie A. Chan, and Edith A. Konopka.
Published
Washington, DC : U.S. G.P.O. ; Denver, CO : For sale by Book and Open-File Report Sales, U.S. Geological Survey, 1992.