- Ardmore, O.K.
- Area, Mazon Creek
- Baird, G.C.
- Bradley, Frank H.
- Braun, Frederick A.
- Bronson, John G.
- Brooks, Harold K.
- Carr, J.C.
- Chicago, Of
- Crawley, L.F.
- Darrah
- Doerrer, E.
- Enterprises, Geological
- Frazar, S.B.
- Greene, F.A.
- Harris, P.
- Herdina, J.
- Hiser, W.
- Kallas, Robert A.
- Keith, A.
- Konecny, J.
- Langford, George
- Langford, G.
- Lesquereux, Leo
- Matthews, W.H.
- Meek
- Montagne, G.
- Moodie, R.L.
- Oliver, George
- Packard
- Patterson, B.
- Piecko, Ted
- Pruvost
- Retallack, Gregory
- Richardson, E.S.
- Scheffel, M.
- Schneider, Vince
- Smolker, R.
- Strong, Samuel S.
- Thompson, Fred
- Trip, Field
- Tully, F.
- Whitfield, R.H.
- Whitfield, J.S.
- Wolff
- Worthen, Winthrop Sprague Brooks
- Young, Andrew