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Subject
- Geology711
- Groundwater705
- Environmental aspects640
- Water quality625
- Mines and mineral resources348
- Pollution341
- Water334
- Geology, Stratigraphic291
- Measurement236
- Analysis225
- Earthquakes198
- Groundwater flow197
- Hydrology196
- Stream measurements192
- Water-supply179
- Hydrogeology170
- Computer programs169
- Quality157
- Geology, Structural154
- Streamflow148