Creators
- School of Mineral Industries of the Pennsylvania State College6
- Sisler, James D.5
- B. Patrick Daley4
- D.C. Jones4
- H.B. Northrup4
- Heyman, Louis4
- J. Ross Corbin4
- M.E. Johnson4
- M.L. Keith4
- Peter D. Usher4
- Sylvain J. Pirson4
- William G. McGlade4
- Arthur P. Honess3
- Chas. R. Fettke3
- Corbin, J. Ross3
- E.G. Williams3
- Fetke, Charles R.3
- Fettke, Charles R.3
- John M. Bergsten3
- L.L. Newman3