1. After a century : revised Paleogene coal stratigraphy, correlation, and deposition, Powder River Basin, Wyoming and Montana Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2010 Resource Type: Book Access & Availability: Loading
2. The age of the Ocala limestone Author/Creator: Cooke, C. Wythe 1887-1971, (Charles Wythe), author Publication/Creation: Washington : Department of the Interior, United States Geological Survey, 1916 Resource Type: Book Access & Availability: Loading
3. The Ajo mining district, Arizona Author/Creator: Gilluly, James, 1896-1980, author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1946 Resource Type: Book Access & Availability: Loading
4. The Ajo mining district, Arizona Author/Creator: Gilluly, James, 1896-1980 Publication/Creation: Washington : U.S. Govt. Print. Off, 1946 Resource Type: Book Access & Availability: Loading
5. The Ajo Mining District, Pima County, Arizona : evidence for Middle Cenozoic detachment faulting, plutonism, volcanism, and hydrothermal alteration Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Resource Type: Book Access & Availability: Loading
6. Alkalic rocks of Iron Hill, Gunnison County, Colorado Author/Creator: Larsen, Esper S. 1879-1961. (Esper Signius) Publication/Creation: Washington : U.S. Govt. Print. Off, 1942 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 197 A-F. Access & Availability: Loading
7. Alkalic rocks of Iron Hill, Gunnison County, Colorado Author/Creator: Larsen, Esper S. 1879-1961, (Esper Signius), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1942 Resource Type: Book Access & Availability: Loading
8. Aniakchak Crater, Alaska Peninsula Author/Creator: Smith, Walter R., author Publication/Creation: [Washington] : [Department of the Interior, United States Geological Survey], [1925] Resource Type: Book Access & Availability: Loading
9. Aniakchak Crater, Alaska Peninsula Author/Creator: Smith, Walter R. Publication/Creation: Washington, D.C. : U.S. G.P.O., 1925 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 132-137. Access & Availability: Loading
10. Areal geology of Alaska, Author/Creator: Smith, Philip S. 1877-1949. (Philip Sidney) Publication/Creation: Washington : U.S. Govt. Print. Off, 1939 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 190-192. Access & Availability: Loading