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Creator
- Sponsor: John E. Stempel189
- Editor: Ed Sovola47
- Editor: Macy I. Broide46
- Editor: Homer H. Murray38
- Editor: George Lamb33
- Editor: Dee Harrington17
- Editor: Robert C. Junk8
- Montgomery, Pauline5
- Geological Survey (U.S.)3
- Herron, W. H. (William Harrison), 1865-3
- Marshall, R. B. (Robert Bradford), 1867-19493
- Agency: Orphan Work2
- C.S. Hammond & Company2
- Griffin, W. H. (William H.)2
- H.M. Gousha Company2
- Hawkins, Geo. T. (George T.)2
- Illinois State Geological Survey2
- Photographer: Adis-Castro, Ellias2
- Renshawe, John H.2
- Sadler, C. L.2