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Creator
- Walker, Alfred C.49
- Schmidt, James J.42
- Struble, Richard A.25
- Owen, Andrew20
- Murphy, Brendan17
- Pree, Henry L. (Henry Louis), 1917-17
- Stein, Russell B.10
- Guy, Donald E.8
- Crowell, Katie7
- Ohio. Division of Geological Survey7
- Levinson, David M6
- White, George W. (George Willard), 1903-19855
- Cummins, James W.4
- Hull, Dennis N. 1948-4
- United States. Works Progress Administration of Pennsylvania.4
- Young, J. H. (James Hamilton)4
- Geological Survey of Ohio3
- Hansen, Michael C.3
- Hull, Dennis N.3
- Risser, Michele3