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- Geological Survey (U.S.)4
- Dolan, Robert3
- Geological Survey (U.S.), issuing body3
- Lins, Harry F.3
- Riggs, Stanley R.3
- United States. National Park Service3
- Ames, Dorothea v. d. P.1
- Armstrong, Brandy N.1
- East Carolina University1
- Hapke, Cheryl J.1
- Henderson, Rachel E.1
- Neal, William J.1
- Pilkey, Orrin H., 1934-1
- Rice, Tracy Monegan1
- Smith, Jodi Jones, 1966-1
- ebrary, Inc1