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Author
- Darton, Nelson Horatio, 1865-19483
- Brock, M. R. (Maurice Rex), 1922-1
- Dover, James H.1
- Geological Survey (U.S.)1
- Mapel, W. J. (William Jameson), 1922-1
- Ruppel, Edward Thompson, 1925-1
- Scott, Glenn Robert, 1918-1
- Sharp, William N. (William Neil), 1922-1
- Smith, J. Fred (Joe Fred), 1911-1
- Taylor, Richard B. (Richard Bartlett)1
