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Guide to USGS geologic and hydrologic maps
- "Guide to USGS publications"
- "Guide to United States Geological Survey geologic and hydrologic maps"@en
- "USGS geologic and hydrologic maps"@en
- "Bibliography"@en
- "Periodicals"@en
- "Guide to USGS geologic and hydrologic maps"@en
- "Guide to USGS geologic and hydrologic maps"