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Creator
- walker, alfred c.49
- schmidt, james j.42
- struble, richard a.25
- pree, henry l. (henry louis), 1917-18
- stein, russell b.10
- guy, donald e.8
- crowell, katie7
- ohio. division of geological survey7
- white, george w. (george willard), 1903-19855
- cummins, james w.4
- hull, dennis n. 1948-4
- hansen, michael c.3
- hull, dennis n.3
- national geographic society (u.s.)3
- risser, michele3
- bownocker, j. a. (john adams), 1865-19282
- cowen, clinton2
- geological survey (u.s.)2
- geological survey of ohio2
- hartzell, glenn w.2