Author
Geological Survey (U.S.),
20
Geological Survey (U.S.)
10
Jones, M. A. 1952-
6
British Columbia. Department of Mines
5
United States. Bureau of Land Management,
5
National Operations Center (U.S.),
4
Rocky Mountain Research Station (Fort Collins, Colo.)
4
United States. Bureau of Land Management. Oregon State Office,
4
Alaska Fisheries Science Center (U.S.)
3
British Columbia. Department of Lands and Works
3
British Columbia. Department of Mines and Petroleum Resources
3
Films for the Humanities & Sciences (Firm)
3
Geological Association of Canada
3
Infobase
3
United States. Bureau of Mines
3
United States. National Marine Fisheries Service,
3
British Columbia. Ministry of Mines and Petroleum Resources
2
Cheadle, Walter B. 1835-1910
2
Clarke, Stephen F.,
2
Commission for Environmental Cooperation (Montréal, Québec)
2
Decade of North American Geology Project
2
Dumroese, R. Kasten
2
Ebbert, J. C.,
2
Espinosa y Tello, Josef, 1763-1815
2
Florida. Division of Forestry
2
Great Britain. Colonial Office
2
Hansen, Arnold J., 1932-
2
Hazlitt, William Carew, 1834-1913
2
Jacobsen, Johan Adrian, 1853-1947
2
Landis, Thomas D.
2
Library of Congress. American-British Law Division,
2
Low, R. A.,
2
Mathews, S. B.,
2
National Geographic Society (U.S.). Cartographic Division
2
Obradovich, John D.,
2
Palmer, H. Spencer 1838-1893
2
Pearson, Robert Carl, 1926-
2
Riley, Lee E.
2
Shupe, John F.
2
Sigafoos, Robert Sumner, 1920-
2
SpringerLink (Online service)
2
St. John, Molyneux, 1838-1904
2
Weinberg, Kenneth L.
2
White, Charles A. 1826-1910,
2
Whymper, Frederick
2
Woldt, A.
2
Ableman, Michael,
1
Akin, Sarah,
1
Alberta Society of Petroleum Geologists
1
Alcalá-Galiano, Dionisio, 1760-1805
1
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