Author
Geological Survey (U.S.)
152 results
ProQuest (Firm)
79 results
North Central Forest Experiment Station (Saint Paul, Minn.)
25 results
United States. Bureau of the Census
25 results
NetLibrary, Inc
23 results
Iowa
16 results
Minnesota
14 results
United States. Bureau of Plant Industry
14 results
United States. National Aeronautical Charting Office
14 results
Wisconsin
14 results
Kansas
13 results
National Water-Quality Assessment Program (U.S.)
13 results
Nebraska
11 results
United States. Congress. House. Committee on Agriculture
11 results
United States. Forest Service. North Central Research Station
11 results
Love, S. K. (Samuel Kenneth), 1903-1995
10 results
North Dakota
10 results
Sims, P. K. (Paul Kibler), 1918-2011
10 results
United States. Federal Board for Vocational Education
10 results
ebrary, Inc
10 results
North Central Regional Center for Rural Development
9 results
Pratt, Walden P.
9 results
South Dakota
9 results
Upper Midwest Environmental Sciences Center (Geological Survey)
9 results
JSTOR (Organization)
8 results
Mohlenbrock, Robert H., 1931-
8 results
United States. Agricultural Research Service
8 results
United States. Bureau of Labor Statistics
8 results
United States. Bureau of the Census. Data User Services Division
8 results
Horton, A. H. (Albert Howard), 1875-1945
7 results
Jorgensen, Donald G.
7 results
Long Term Resource Monitoring Program (Environmental Management Program)
7 results
Society for the Study of Midwestern Literature (U.S.)
7 results
United States. Agricultural Adjustment Administration
7 results
United States. Bureau of Fisheries
7 results
United States. Forest Service
7 results
Arkansas Geological Survey
6 results
Missouri
6 results
Paulsen, Carl G.
6 results
U.S. Fish and Wildlife Service
6 results
United States. Congress. Senate. Committee on Agriculture and Forestry
6 results
United States. Department of Agriculture
6 results
United States. Department of Agriculture. Office of the Secretary
6 results
United States. Environmental Protection Agency
6 results
United States. Office of Cooperative Extension Work
6 results
Battaglin, William A.
5 results
Day, Warren C.
5 results
EBSCOhost
5 results
Heady, Earl O. (Earl Orel), 1916-1986
5 results
Imes, Jeffrey L.
5 results
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