• 1 Memorial Library
• 1 Wisconsin Historical Society Library

• 7 Soil surveys
• 7 Soils
• 1 Airplanes
• 1 Fisheries
• 1 Fishery law and legislation
• 1 Gas fields
• 1 Land use
• 1 Oil fields
• 1 Piloting
• 1 Soil conservation
• 1 Soil erosion

• 2 Tennessee Valley Authority
• 1 Anderson, Chandler P. (Chandler Parsons), 1866-1936
• 1 Bass, Turner Cheshire, 1906-
• 1 Bonsteel, Jay A. (Jay Allan), 1873-
• 1 Colorado Agricultural Experiment Station
• 1 Goldston, E. F. (Eugene Frizzelle), 1905-1980
• 1 Great Britain
• 1 Idaho Agricultural Experiment Station
• 1 Jurney, R. C. (Robert Campbell), 1887-1985
• 1 Knobel, E. W. (Edmund Wilhelm), 1889-1977
• 1 Nelson, L. B
• 1 Permanent Court of Arbitration
• 1 Poulson, A. E
• 1 Poulson, E. N. (Edwin Noel), 1895-
• 1 Shearin, A. E
• 1 Tittmann, O. H. (Otto Hilgard), 1850-1938
• 1 United States. Central Intelligence Agency
• 1 United States. Federal Aviation Administration
• 1 United States. Soil Conservation Service
• 1 University of Idaho. College of Agriculture
• 1 Virginia Agricultural Experiment Station
• 1 Watkins, W. I. (William Isaac), 1888-1973

• 2 Virginia
• 1 Bingham County
• 1 Blackfoot-Aberdeen Region
• 1 Canada
• 1 Colorado
• 1 Culpeper County
• 1 Idaho
• 1 Madison County
• 1 Minnesota
• 1 New Hampshire
• 1 Newfoundland and Labrador
• 1 North Carolina
• 1 Pennsylvania
• 1 Rock County
• 1 Smyth County
• 1 Strafford County
• 1 United States
• 1 Washington County

Limit year range