Author
United States. Bureau of Mines
237
Geological Survey (U.S.),
146
Geological Survey (U.S.)
123
United States. Bureau of Land Management
61
Colorado Geological Survey
52
United States. Office of Surface Mining Reclamation and Enforcement
31
Westfield, James
13
Nagy, John
12
Ohio. Division of Reclamation
12
Stahl, R. Ward
12
United States. Bureau of Land Management. Casper Field Office
12
Hartmann, Irving, 1905-
11
United States. Bureau of Land Management. High Plains District Office
11
ScienceDirect (Online service)
10
United States. Bureau of Land Management. Portland Service Center,
10
United States. Congress. House. Committee on Natural Resources,
10
Weaver, H. F.
10
Ambrose, Carol Morgans Tremain
9
Colorado. Mined Land Reclamation Division
9
Illinois State Geological Survey
9
Murray, D. Keith
9
Rice, George S. 1866-1950
9
United States. Environmental Protection Agency. Office of Water
9
United States. Office of Coal, Nuclear, Electric, and Alternate Fuels
9
Carroll, Christopher J.
8
Cervik, Joseph
8
Fieldner, Arno Carl, 1881-1966
8
Kissell, Fred N.
8
Library of Congress. Law Library,
8
Moebs, Noel N.
8
SpringerLink (Online service)
8
United States. Bureau of Indian Affairs
8
United States. Congress. House. Committee on Natural Resources. Subcommittee on Energy and Mineral Resources,
8
United States. Forest Service
8
Bureau of Mines Technology Transfer Seminar
7
Jankowski, Robert A.
7
Keenan, C. M.
7
Mainiero, Richard J.
7
McCulloch, C. M.
7
United States. Congress. House. Committee on Education and Labor
7
United States. Congress. Senate. Committee on Appropriations. Subcommittee on Departments of Labor, Health and Human Services, Education, and Related Agencies
7
University of Kentucky. Behavioral Research Aspects of Safety and Health Working Group
7
Finfinger, Gerald L.
6
Greenwald, H. P. 1893-
6
Library of Congress. Congressional Research Service,
6
Rushworth, Peter
6
United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on Mining and Natural Resources
6
United States. Energy Information Administration
6
WWC Engineering
6
Western Water Consultants
6
more ...