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Creator
- Sanborn Map Company1,787
- Geological Survey (U.S.)281
- United States. Soil Conservation Service35
- University of Chicago Library32
- University of Chicago. Social Science Research Committee18
- Owen, Andrew14
- University of Chicago. Department of Sociology14
- Murphy, Brendan12
- City of Chicago Innovation and Technology Department-GIS Program8
- Illinois State Geological Survey8
- Mitchell, S. Augustus (Samuel Augustus), 1792-18687
- Graham, J. D. (James Duncan), 1799-18654
- Levinson, David M4
- Mayer, Harold M. (Harold Melvin), 1916-19944
- Rand McNally and Company4
- United States Census Bureau4
- United States. Army. Corps of Topographical Engineers4
- Young, J. H. (James Hamilton)4
- Peck, John Mason, 1789-18583
- Blanchard, Rufus, 1821-19042