Structure Contour and Isopach Maps of the Lance Formation, Northern Powder River Basin, Northeastern Wyoming (2003)

Ver Ploeg, A.J., De Bruin, R.H., Lyman, R.M., Jones, N.R., and Case, J.C., 2003, Structure contour and isopach maps of the Lance Formation, northern Powder River Basin, northeastern Wyoming: Wyoming State Geological Survey Open File Report 03-2.