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Spatial Coverage
- Pennsylvania4
- Chester County3
- California2
- Marshall Islands2
- Montana2
- San Bernardino County2
- Alabama1
- Baldwin County1
- Blackfeet Indian Reservation1
- Bucks County1
- Buffalo County1
- Delaware1
- Delaware City Region1
- High Plains (U.S.)1
- High Plains Aquifer1
- Idaho1
- Kwajalein Atoll1
- Kwajalein Island1
- Middle Atlantic States1
- Mississippi1
