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Place
- Afghanistan1
- Africa1
- Alabama15
- Alameda County (Calif.)70
- Alaska14
- Albemarle Sound (N.C.)7
- Albion River Watershed (Calif.)8
- Albuquerque (N.M.)1
- American Samoa18
- Arizona17
- Arkansas15
- Asia1
- Atlanta (Ga.)1
- Atlantic Coast (New England)1
- Atlantic Coast (U.S.)1
- Atlantic Ocean33
- Austin (Tex.)1
- Baltimore (Md.)1
- Baltimore Canyon7
- Block Island (R.I. : Island)4