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2. National Geologic Mapping Reauthorization Act of 1996
3. National Geologic Mapping Reauthorization Act of 1997
4. National Geologic Mapping Reauthorization Act of 1999
5. Natural resources research
6. Natural resources research
7. The naturalist
8. Navajo country : a geology and natural history of the Four Corners Region
9. Navajo country : a geology and natural history of the Four Corners Region
10. NDGS newsletter : a publication of the North Dakota Geological Survey
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