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Collection
- Water-resources investigations report598
- Scientific investigations report193
- U.S. Geological Survey professional paper132
- Scientific investigations map72
- Water-resources investigations44
- Fact sheet33
- Open-file report29
- Geological Survey professional paper26
- Regional aquifer-system analysis24
- U.S. Geological Survey water-supply paper23
- U.S. Geological Survey water-resources investigations report20
- Hydrologic investigations atlas17
- Regional aquifer-system analysis--Gulf coastal plain15
- Professional paper14
- Regional aquifer-system analysis--southeastern coastal plain14
- Water resources investigations report11
- Regional aquifer-system analysis--Central Midwest8
- Regional aquifer-system analysis--Puget-Willamette lowland8
- U.S. Geological Survey circular7
- Water resources investigations7