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2. Damming Grand Canyon : the 1923 USGS Colorado River expedition
3. Damming Grand Canyon The 1923 USGS Colorado River Expedition
4. Puerto Rico
5. Ground-water levels, predevelopment ground-water flow, and stream-aquifer relations in the vicinity of the Savannah River Site, Georgia and South Carolina
6. River basins of the United States : the Potomac
7. The National gazetteer of the United States of America. Florida 1992
8. The National gazetteer of the United States of America. North Dakota 1990
9. The National gazetteer of the United States of America. South Dakota 1989
10. The National gazetteer of the United States of America. Indiana, 1988
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