Geologic Map of the Lance Creek 30' x 60' Quadrangle, Niobrara and Converse Counties, Wyoming, Fall River and Custer Counties, South Dakota, and Sioux County, Nebraska (2008)

Johnson, J.F., and Micale, D.C., 2008, Geologic map of the Lance Creek 30' x 60' quadrangle, Niobrara and Converse counties, Wyoming, Fall River and Custer counties, South Dakota, and Sioux County, Nebraska: Wyoming State Geological Survey Map Series 79, scale 1:100,000.