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Author
- Geological Survey (U.S.)5
- McGrew, Laura W. (Laura Wenger), 1921-4
- Moore, Frank B. (Frank Baker), 1912-4
- Force, Eric R.3
- Kepferle, Roy Clark, 1926-3
- Luft, Stanley Jeremie, 1927-3
- Moore, Samuel L.3
- Peper, John D.3
- Peterson, Warren Lee, 1925-3
- Kehn, Thomas M.2
- McIntosh, Willard L.2
- Seitz, James F. (James Frederick), 1920-2
- Swadley, W. C.2
- Trace, Robert Denny, 1917-2
- Tysdal, Russell G.2
- Wallace, Roberts Manning, 1915-2
- Amos, Dewey Harold, 1925-1
- Bateman, Andrew F.1
- Black, Douglas F. B.1
- Blade, Lawrence V. (Lawrence Vernon), 1917-1
