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Subject
- Submarine topography46
- Ocean bottom39
- Marine sediments14
- Geology8
- Geology, Structural7
- Lakes6
- Reservoirs6
- Continental shelf5
- Water levels4
- Reservoir sedimentation3
- Seismic prospecting3
- Water quality3
- Water-supply3
- Echo scattering layers2
- Geomorphology2
- Hydrogeology2
- Lake hydrology2
- Lake trout2
- Lake trout fisheries2
- Optical radar2