• 5 Wisconsin Historical Society Library
• 2 Arboretum Research Library
• 2 UW Archives
• 2 Verona Shelving Facility
• 1 ILL Library
• 1 Zoological Museum Research Library

• 4 Microforms

• 13 Forests and forestry
• 10 Research
• 4 Conservation of natural resources
• 4 Milk trade
• 4 North Central Forest Experiment Station (Saint Paul, Minn.)
• 3 Agriculture
• 3 Airports
• 3 Fruit
• 2 Bismarck Plant Materials Center (U.S.)
• 2 Control
• 2 Diseases and pests
• 2 Forest ecology
• 2 Forest management
• 2 Heliports
• 2 Milk
• 2 National parks and reserves
• 2 Plant materials centers
• 2 Plants for soil conservation
• 2 Prairie ecology
• 2 Quality
• 2 Seaplane bases
• 2 Soil conservation
• 2 Soil-binding plants
• 2 Spraying and dusting in agriculture
• 2 Sustainable Agriculture Research & Education (Program). North Central Region

• 14 North Central Forest Experiment Station (Saint Paul, Minn.)
• 5 United States. Forest Service. North Central Research Station
• 2 Bismarck Plant Materials Center (U.S.)
• 2 United States. Aeronautical Information Services
• 2 United States. Federal Milk Market Administrator (Upper Midwest Marketing Area)
• 2 United States. Forest Service. Northern Research Station
• 2 United States. National Park Service. Midwest Region. Research and Science Division
• 2 University of Wisconsin--Extension. Cooperative Extension Service
• 2 Wisconsin Statistical Reporting Service
• 1 Central States Forest Experiment Station
• 1 Iowa Agriculture and Home Economics Experiment Station
• 1 Michigan Milk Producers Association
• 1 Midwest Fruit Workers Group
• 1 Midwest Milk Marketing Conference
• 1 Midwest Prairie Conference
• 1 Midwestern Milk Marketing Conference
• 1 North Central Regional Project
• 1 Sustainable Agriculture Research & Education (Program). North Central Region
• 1 Symposium on Prairie and Prairie Restoration
• 1 United States. Agricultural Adjustment Administration
• 1 United States. Agricultural Marketing Service. Fruit and Vegetable Division
• 1 United States. Agricultural Research Service. North Central Region
• 1 United States. Department of Agriculture
• 1 United States. Environmental Protection Agency. Region V. Office of Public Affairs
• 1 United States. National Aeronautical Charting Office

• 46 English

• 7 United States
• 2 Northeastern States
• 2 Wisconsin
• 1 Great Lakes Region (North America)
• 1 Iowa

• 23 Periodicals
• 5 Statistics
• 4 Congresses
• 3 Bibliography
• 3 Directories
• 1 Catalogs

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