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Institution
Collection
Format
Author
Language
Literary Form
Region
6
Chester County
6
Pennsylvania
4
United States
1
Big Elk Creek Watershed (Pa. and Md.)
1
Brandywine Creek Watershed (Pa. and Del.)
1
Delaware River Watershed (N.Y.-Del. and N.J.)
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1
Octoraro Creek (Pa. and Md.)
1
Schuylkill River Watershed
1
White Clay Creek Watershed (Pa. and Del.)
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Year of Publication