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Spatial Coverage
- Africa, North2
- Antarctic Ocean Region1
- Antarctica1
- Apennines1
- Arbuckle-Simpson Aquifer1
- Arbuckle-Simpson Aquifer (Okla.)1
- Arctic Ocean1
- Arctic Region.1
- Arctic Regions.1
- Arctic regions1
- Arctic.1
- Arizona1
- Asia2
- Atlantic Coast1
- Atlantic Coast (Africa)1
- Atlantic Coast (Morocco)1
- Australia1
- Baltimore County1
- Bolivia1
- California2
