• 19 Wisconsin Historical Society Archives
• 11 Map Library (Robinson)
• 3 Geology and Geophysics Library (Leith)

• 94 Maps, Atlases

• 5 Railroads
• 3 Gas fields
• 3 Geology
• 3 Oil fields
• 2 Administrative and political divisions
• 2 Electric lines
• 2 Geology, Stratigraphic
• 2 Natural gas
• 2 Petroleum
• 2 Power-plants
• 1 Alaska-Yukon-Pacific Exposition (1909 : Seattle, Wash.)
• 1 Counties
• 1 Distances, etc
• 1 Drainage
• 1 Electric power
• 1 Electric power transmission
• 1 Electric power-plants
• 1 Electric utilities
• 1 Gas wells
• 1 Hydrology
• 1 Military bases, American
• 1 Mines and mineral resources
• 1 Natural gas pipelines
• 1 Oil wells
• 1 Petroleum pipelines

• 93 Geological Survey (U.S.)
• 85 Hassan, A. F
• 27 Marshall, R. B. (Robert Bradford), 1867-1949
• 9 Hassan, A. F.
• 4 Birdseye, C. H. (Claude Hale), 1878-1941
• 3 Staack, J. G. (John George), 1878-
• 2 Bass, N. Wood (Nathan Wood), 1893-1979
• 1 Burton, Gertrude M
• 1 Castor, H. Russell
• 1 Demok, Flora K
• 1 Hansen, Miller
• 1 Iowa Geological Survey
• 1 MacNeil, F. Stearns (Francis Stearns), 1909-
• 1 Missouri
• 1 North Dakota Geological Survey
• 1 Purdue, A. H. (Albert Homer), 1861-1917
• 1 Pusey, Lewis B
• 1 Richardson, G. B. (George Burr), 1872-1949
• 1 Ross, Clyde P. (Clyde Polhemus), 1891-1965
• 1 Tennessee
• 1 Thomas, G. D
• 1 Thomas, G. D. (Cartographer)
• 1 United States. Navy Department
• 1 United States. Post Office Department
• 1 Walker, Flora K

• 94 English

• 6 Idaho
• 6 Michigan
• 6 Wisconsin
• 5 Colorado
• 5 South Carolina
• 4 Florida
• 4 New York (State)
• 4 Pennsylvania
• 3 Louisiana
• 3 Minnesota
• 3 Oregon
• 3 Vermont
• 3 Washington (State)
• 2 California
• 2 Delaware
• 2 Georgia
• 2 Hawaii
• 2 Kansas
• 2 Maryland
• 2 Nevada
• 2 New Hampshire
• 2 North Carolina
• 2 Ohio
• 2 Tennessee
• 2 United States

• 94 Maps
• 45 Outline maps
• 2 Topographic maps
• 1 Military maps
• 1 Physical maps
• 1 base maps
• 1 outline maps

Limit year range