by Robert L. Houghton ... [and others] ; prepared in cooperation with the U.S. Bureau of Land Management, the U.S. Environmental Protection Agency, and the North Dakota Geological Survey
by Melvin V. Marcher ... [and others] ; prepared in cooperation with the U.S. Bureau of Land Management under the Energy Minerals Rehabilitation Inventory and Analysis Program
by Melvin V. Marcher ... [and others] ; prepared in cooperation with the U.S. Bureau of Land Management under the Energy Minerals Rehabilitation Inventory and Analysis Program