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- Geological Survey (U.S.)26
- Kurtén, Björn7
- Flint, Richard Foster, 1902-19766
- Leverett, Frank, 1859-19436
- Stock, Chester, 1892-19506
- Gibbard, Philip L. (Philip Leonard), 1949-5
- Hay, Oliver Perry, 1846-19305
- Holman, J. Alan, 1931-5
- Jillson, Willard Rouse, 1890-19755
- Kay, George F. (George Frederick), 1873-19435
- Miller, Loye Holmes, 1874-19705
- West, R. G.5
- ebrary, Inc5
- Butzer, Karl W.4
- Grayson, Donald K.4
- Le Roux, F. G.4
- Leonard, A. Byron (Arthur Byron), 1902-19874
- Levy, Sharon, 1959-4
- Merriam, John C. (John Campbell), 1869-19454
- Project Muse4