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Author
- Geological Survey (U.S.)32
- Goldsmith, Richard, 1918-6
- Snyder, George L. (George Leonard), 1927-3
- Fritts, Crawford E. (Crawford Ellsworth), 1927-2
- Handman, Elinor H.2
- Hanshaw, Penelope M.2
- Schnabel, Robert W.2
- Simpson, Howard E.2
- Hartshorn, Joseph H. (Joseph Harold), 1922-1
- La Sala, A. M. (Albert M.), 1931-1
- Langer, William H.1
- McElroy, Marianne1
- National Survey Company1
- Pessl, Fred1
- Schafer, John P. (John Phillip), 1922-1
- United States. Public Roads Administration1
- Weiss, L. A. (Lawrence A.)1
