Publisher
- Wallace, McHarg, Roberts and Todd (60)
- U.S. Geological Survey (Washington, D.C) (55)
- publisher not identified (40)
- The Survey (Washington, D.C) (33)
- (London) (28)
- General Land Office (Washington) (23)
- The Department (St. Paul, Minnesota) (21)
- General Land Office (Washington, D.C) (19)
- The Survey (Washington) (18)
- Sanborn Map Company (New York), 1913 (17)
- American Geographical Society (New York) (15)
- The Office (Washington, D.C) (14)
- Rand McNally & Co (Chicago) (12)
- U.S. Geological Survey (Washington) (12)
- Surveyor General's Office; Calcutta (11)
- Dept. of the Interior (Ottawa) (10)
- Geographia Ltd (London) (10)
- Geological Survey of Canada (Ottawa) (10)
- J.H. Colton & Co (New York) (10)
- Rand McNally (Chicago) (10)
