Author
Geological Survey (U.S.)
11
Geological Survey (U.S.),
11
Afghanistan. Department of Geological Survey
4
Afghanistan. Idārah-i ʻUmūmī-i Jiyūdīzī va Kārtūgrāfī
4
Bohannon, Robert G.
4
United States. Agency for International Development
4
Kramer, W. B. 1896-1963,
3
Colorado Geological Survey,
2
New York State Geological Survey
2
Wilson, Frederic H., 1950-
2
Bacon, Charles R.
1
Barkmann, Peter E.,
1
Booth, Derek B.
1
Colorado Geological Survey
1
Colorado. Department of Natural Resources,
1
Colorado. Division of Minerals and Geology,
1
Covington, H. R.
1
Crowley, William Patrick
1
Dechesne, Marieke,
1
Denver Museum of Nature and Science,
1
Dodd, Robert T., 1936-
1
Erdmann, C. E. 1897-1971,
1
Feltis, R. D. 1930-
1
Fisher, Donald W.
1
Fridrich, C. J.
1
Fryxell, Fritiof, 1900-1986
1
Grand Canyon Natural History Association
1
Grybeck, D. J.
1
Hansen, Robert E.
1
Howell, D. G.
1
Huizinga, Richard J.,
1
Iowa Geological Survey
1
Jewel, Eleanore B.
1
Johnson, Kirk R.,
1
Keller, John W. 1964-
1
Kinney, Douglas M. 1917-
1
Kucks, R. P.
1
Maryland Geological Survey
1
Matthes, François, 1874-1948
1
Maxson, John H.
1
Maxson, John H. 1906-1966
1
McCabe, Margaret Ketcham
1
New Jersey. Division of Water Policy and Supply
1
Nichols, William D.
1
Patton, Horace Bushnell, 1858-1929
1
Pike, Richard J.
1
Raynolds, Robert G. H.,
1
Reinhardt, Juergen, 1946-
1
Richards, Joseph M.,
1
Rivers, Benjamin C.,
1
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