1. Total petroleum systems and geologic assessment of oil and gas resources in the Powder River basin province, Wyoming and Montana Author/Creator: Anna, Lawrence O. Publication/Creation: Reston, Va. : U.S. Geological Survey, 2009 Resource Type: Book Access & Availability: Loading
2. Total petroleum systems and geologic assessment of oil and gas resources in the Powder River basin province, Wyoming and Montana Author/Creator: Anna, Lawrence O. Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2009 Resource Type: Book Access & Availability: Loading
3. Assessment of undiscovered oil and gas resources of the Powder River Basin Province of Wyoming and Montana, 2006 update Author/Creator: Anna, Lawrence O. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2006] Resource Type: Book Access & Availability: Loading
4. Geologic framework of the ground-water system in Jurassic and Cretaceous rocks in the northern Great Plains, in parts of Montana, North Dakota, South Dakota, and Wyoming Author/Creator: Anna, Lawrence O. Publication/Creation: For sale by the Distribution Branch, U.S. Geological Survey Resource Type: Book Access & Availability: Loading