• 24 Wisconsin Historical Society Archives
• 20 Map Library (Robinson)
• 1 Geology and Geophysics Library (Leith)

• 197 Maps, Atlases

• 13 Administrative and political divisions
• 13 Counties
• 7 Roads
• 4 Railroads
• 3 Irrigation
• 3 Precipitation (Meteorology)
• 2 Public lands
• 2 Rivers
• 1 Boundaries
• 1 Cities and towns
• 1 Watersheds

• 41 Hassan, A. F
• 17 Marshall, R. B. (Robert Bradford), 1867-1949
• 10 United States. Department of Agriculture. Division of Publications
• 4 Hassan, A. F.
• 4 Illinois State Geological Survey
• 4 United States. National Resources Board
• 3 U.S. Coast and Geodetic Survey
• 3 United States. Office of Farm Management
• 2 Birdseye, C. H. (Claude Hale), 1878-1941
• 2 Gannett, Henry, 1846-1914
• 2 Oklahoma
• 1 Alpha, Tau Rho
• 1 Haiti. Département des travaux publics
• 1 King, Philip B., 1903-1987
• 1 Missouri
• 1 Missouri. Bureau of Geology and Mines
• 1 Missouri. Geological Survey
• 1 Service des Leves Topographiques d'Haiti
• 1 Smith, Glenn S. (Glenn Shepard)
• 1 Staack, J. G. (John George), 1878-
• 1 United States. Bureau of Agricultural Economics
• 1 United States. Bureau of the Census

• 195 English
• 1 French
• 1 Spanish

• 32 United States
• 10 Oregon
• 9 Idaho
• 9 Wisconsin
• 7 Illinois
• 7 Montana
• 7 New Mexico
• 6 Michigan
• 6 Minnesota
• 6 Vermont
• 5 Colorado
• 5 Indiana
• 5 Kentucky
• 5 Maryland
• 5 New Hampshire
• 5 Oklahoma
• 5 Pennsylvania
• 4 Connecticut
• 4 Delaware
• 4 Iowa
• 4 Louisiana
• 4 Massachusetts
• 4 Missouri
• 4 New York (State)
• 4 North Carolina

Limit year range