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Creator
- Sponsor: Joseph A. Wright, John E. Stemple, Walter A. Stiegleman, Alan Dailey72
- Editor: Jimmie Angelopolous39
- Editor: Annadell Craig33
- Editor: Robert C. Junk24
- Sponsor: John E. Stemple, J. Wymond French, Walter A. Stiegleman23
- Editor: William Brooks9
- Sponsor: Stephen G. Savage, J. Wymond French, John E. Stemple9
- Geological Survey (U.S.)4
- Montgomery, Pauline3
- Coal Trade Association of Indiana1
- Gehres, W. S. (Wilmer Sherman), 1887-19631
- Goodlove, C. W.1
- H.M. Gousha Company1
- Herrington, R. M. (Russell McKee), 1890-19771
- Herron, W. H. (William Harrison), 1865-1
- Illinois State Geological Survey1
- Joint Highway Research Project (Ind.)1
- Kentucky Geological Survey1
- Mark, Stephen1
- Marshall, R. B. (Robert Bradford), 1867-19491