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Author/Creator
- Library of Congress. Congressional Research Service26
- Villarreal, M. Angeles19
- Fergusson, Ian F.11
- Blethen, Tyler4
- Cimino-Isaacs, Cathleen4
- Folsom, Ralph Haughwout4
- Hart, Nina M.4
- Wong, Liana4
- Wood, Curtis, Jr., 1941-4
- Castonguay, Stéphane3
- Evenden, Matthew D. (Matthew Dominic), 1971-3
- Glick, Leslie Alan3
- Rivett, Sarah3
- Akhtar, Shayerah Ilias2
- Brown, Kathleen M., 1960-2
- Canis, Bill2
- Casey, Christopher A., 1984-2
- Folsom, W. Davis2
- Geological Survey (U.S.)2
- Lawton Smith, Helen2