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Author
- Geological Survey (U.S.)172
- Cornwall, Henry Rowland, 1913-3
- Crandell, Dwight Raymond, 1923-2
- Townsend, Roland C.2
- Ferguson, Henry Gardiner, 1882-1
- Gard, Leonard Leade, 1923-1
- Johnson, Ross B., 1919-1
- Noble, L. F. (Levi Fatzinger), 1882-19651
- Pepper, James F.1
- Trimble, Donald E.1
- Waddell, Courtney1
- Wagner, Holly Clyde, 1918-1
- Waldron, Howard H. (Howard Hamilton), 1917-1
