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Pennsylvania
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10
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6
United States
6
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4
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2
Maryland
2
Middle Atlantic States
2
New York (State)
2
Pennsylvanie (États-Unis)
2
Connecticut
1
Conococheague Creek Region (Pa.)
1
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1
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1
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1
États-Unis
1
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1
Great Britain
1
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1
Lancaster County (Pa.)
1
Pennsylvanie (États-Unis)
1
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1
Philadelphie (Penns.)
1
Virginia
1