1. Geologic models and evaluation of undiscovered conventional and continuous oil and gas resources : upper Cretaceous Austin Chalk, U.S. Gulf Coast / by Krystal Pearson. Pearson, Krystal Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2012. Book Online
2. Outcrops, fossils, geophysical logs, and tectonic interpretations of the upper Cretaceous Frontier Formation and contiguous strata in the Bighorn Basin, Wyoming and Montana / by E.A. Merewether, W.A. Cobban, and R.W. Tillman. Merewether, E. A. (Edward Allen), 1930- Reston, Va. : U.S. Geological Survey, 2010. Book Online
3. A tectonic model for the spatial occurrence of porphyry copper and polymetallic vein deposits : applications to central Europe / by Lawrence J. Drew. Drew, Lawrence J. Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2006. Book Online
4. Hydrogeologic framework and estimates of ground-water volumes in Tertiary and Upper Cretaceous hydrogeologic units in the Powder River Basin, Wyoming / by Kurt Hinaman ; prepared in cooperation with the Bureau of Land Management. Hinaman, Kurt C. Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2005. Book Online