• 72 Wisconsin Historical Society Library
• 7 Arboretum Research Library
• 4 Middleton Shelving Facility
• 4 Science Libraries Shelving Facility
• 3 Verona Shelving Facility
• 2 Memorial Library
• 2 UW Archives
• 2 Wisconsin's Water Library
• 1 Shared Print Repositories

• 39 Microforms
• 2 Computer file

• 543 Control
• 342 Trees
• 136 Pine
• 117 Potatoes
• 96 Insect pests
• 93 Corn
• 92 Fruit
• 89 Ponderosa pine
• 87 Forest insects
• 79 Conifers
• 77 Cotton
• 77 Grain
• 76 Biological control
• 76 Rice
• 72 Integrated control
• 70 Pests
• 65 Tomatoes
• 64 Mountain pine beetle
• 64 Vegetables
• 62 Lodgepole pine
• 60 Apples
• 59 Dwarf mistletoes
• 59 Virus diseases of plants
• 58 Douglas fir

• 276 United States. Forest Service
• 199 University of Wisconsin--Extension. Cooperative Extension Programs
• 86 Worf, Gayle L
• 80 Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
• 73 United States. Agricultural Research Service
• 73 University of Wisconsin--Extension. Cooperative Extension Service
• 65 North Central Forest Experiment Station (Saint Paul, Minn.)
• 53 United States. Forest Service. Pacific Northwest Region
• 46 Binning, L. K
• 45 Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
• 44 United States. Department of Agriculture
• 43 Southeastern Forest Experiment Station (Asheville, N.C.)
• 42 Northeastern Forest Experiment Station (Radnor, Pa.)
• 40 Stevenson, Walter R
• 39 United States. State and Private Forestry. Northeastern Area
• 37 Intermountain Forest and Range Experiment Station (Ogden, Utah)
• 37 Wade, E. K
• 35 Intermountain Research Station (Ogden, Utah)
• 35 Mahr, Daniel L
• 35 Pacific Northwest Research Station (Portland, Or.)
• 34 American Phytopathological Society
• 32 Heimann, Mary Francis
• 32 Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.)
• 31 United States
• 30 Libby, J. L

• 3,048 English
• 19 French
• 17 Chinese
• 17 Spanish
• 12 German
• 7 Russian
• 2 Italian
• 2 Japanese
• 2 Portuguese
• 1 Czech
• 1 Dutch
• 1 Estonian
• 1 Norwegian
• 1 Persian

• 294 United States
• 104 Wisconsin
• 72 California
• 49 Southern States
• 48 Oregon
• 47 Northwest, Pacific
• 42 West (U.S.)
• 37 Alaska
• 36 Idaho
• 35 Canada
• 30 North America
• 26 Washington (State)
• 23 Arizona
• 22 Colorado
• 20 Lake States
• 19 Northeastern States
• 19 Southwestern States
• 17 Florida
• 17 Middle West
• 17 Montana
• 15 New Mexico
• 15 Tropics
• 13 British Columbia
• 13 Maine
• 12 Black Hills (S.D. and Wyo.)

Limit year range