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Author
- Geological Survey (U.S.)3
- Witkind, Irving Jerome, 1917-2
- Brackley, Richard A., 1927-1
- Elliott, James E.1
- Epis, Rudy C., 1930-1
- Gott, Garland Bayard, 1912-1
- Head, William J.1
- Kuntz, Mel A.1
- Lindsey, David A.1
- McPherson, Benjamin F.1
- Price, Don, 1929-1
- Robinson, Paul T.1
- Tysdal, Russell G.1
- Van Horn, Richard, 1920-1
- Walker, George Walton, 1921-1
- Wobus, Reinhard A.1
