Preliminary Geologic Map of the Barnum Quadrangle, Johnson County, Wyoming (1988)

Ver Ploeg, A.J., De Bruin, R.H., and Greer, P.L., 1988, Preliminary geologic map of the Barnum quadrangle, Johnson County, Wyoming: Wyoming Geological Survey [Wyoming State Geological Survey] Open File Report 88-5, scale 1:24,000.