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Author/Creator
- Bryant, Bruce, 1930-12
- Geological Survey (U.S.)11
- Kellogg, Karl S.2
- Shroba, R. R.2
- Tweto, Ogden, 1912-19832
- Williams, Frank E.2
- Bohannon, Robert G.1
- Denver Science Publishing Network1
- Dumonceaux, Gayle M.1
- Ernst, W. G. (Wallace Gary), 1931-1
- Pecora, W. T. (William Thomas), 1913-19721
- Premo, Wayne R.1
- Redsteer, Margaret H.1
- Ruleman, C. A. (Chester Allan)1
- Schmidt, Robert G. (Robert Georges), 1923-1
- Van Sistine, Paco R.1
- Wilson, Anna B. (Anna Burack)1