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Institution
Collection
Format
Subject
Author
Gilbert, Francis P.
33
Geological Survey (U.S.)
17
Zietz, Isidore, 1919-
10
Bromery, Randolph W. 1926-2013
5
Petty, A. J.
4
Balsley, J. R.
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4
Bath, G. D.
4
Boynton, G. R. 1935-
4
Galat, G. A.
4
Henderson, John R.
4
Kirby, John R.
4
Mangan, George B.
4
Meuschke, J. L.
4
Riggle, Frederic E.
4
Schwartz, George M. 1892-1980
2
Andreasen, Gordon E., 1924-
2
Kirby, John R., Jr
2
Minnesota Geological Survey
2
North Carolina. Division of Land Resources
2
Philbin, P. W.
2
Snyder, Stephen L.
1
Johnson, Robert W., Jr., 1924-
1
Maryland Geological Survey
1
New Hampshire. State Planning and Development Commission
1
New York State Geological Survey
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Language
Genre
Region
6
Maine
6
Minnesota
6
New Hampshire
6
Vermont
5
Franklin County
5
Montana
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5
Orange County
4
Spotsylvania County
4
Virginia
3
Louisa County
3
Maryland
3
North Carolina
3
Oxford County
3
Sullivan County
3
Windsor County
2
Georgia
2
Oklahoma
2
Southern States
1
Baltimore County
1
Caledonia County
1
Cecil County
1
Cheshire County
1
Connecticut
1
Delaware
1
Glencoe Region
1
Glencoe Region (Okla.)
1
Grafton County
1
Harford County
1
Hominy Region
1
Hominy Region (Okla.)
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Year of Publication