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Environmental Resources Research Institute
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Inland Waters
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Boundaries
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1. 104 State Water Plan Watersheds: Pennsylvania
1998. Environmental Resources Research Institute. Digitized boundaries of 104 major watersheds defined in the Pennsylvania state water plan. The State Water Plan, originally developed in the 1970s,...
2. Small Watersheds: Pennsylvania
1997. Environmental Resources Research Institute. Boundaries of 9,895 watersheds in Pennsylvania indicated in the Pennsylvania gazeteer of streams. These boundaries enclose catchment areas for name...