Independent Engineer’s Report on the Properties of the Penn-Wyoming Copper Company and the Grand Encampment Copper Mining District Located in the County of Carbon, State of Wyoming (1906)

Vandenberge, J.H., 1906, Independent engineer’s report on the properties of the Penn-Wyoming Copper Company and the Grand Encampment copper mining district located in the county of Carbon, State of Wyoming: Office of the State Geologist [Wyoming State Geological Survey] Mineral Report 1906-1, 25 p.