• 46 Map Library (Robinson)
• 46 Wisconsin Historical Society Archives

• 47 Census districts

• 65 United States. Bureau of the Census. Geography Division
• 1 Geological Survey (U.S.)

• 1 Spanish

• 2 Alabama
• 2 Alaska
• 2 California
• 2 Florida
• 2 Guam
• 2 Hawaii
• 2 Idaho
• 2 Illinois
• 2 Kansas
• 2 Louisiana
• 2 Michigan
• 2 New Mexico
• 2 North Carolina
• 2 Pacific Islands (Trust Territory)
• 2 South Dakota
• 2 Texas
• 2 Washington (State)
• 2 West Virginia
• 2 Wyoming
• 1 American Samoa
• 1 Arizona
• 1 Arkansas
• 1 British Virgin Islands
• 1 Colorado
• 1 Connecticut

Limit year range