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Author
Environmental Resources Research Institute
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Subject
Hydrology
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Year
1998
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1. Major River Basins: Pennsylvania
1998. Environmental Resources Research Institute. This polygon layer delineates the boundaries of 8 major watersheds in Pennsylvania that have shown through past vertebrate inventory collection rec...
2. Networked streams of Pennsylvania
1998. Environmental Resources Research Institute. The connected network of streams and waterways of Pennsylvania are indicated as single lines in this coverage. Waterways are given connected topolo...