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Author: Geological Survey (U.S.)
Call Number: Q - Science
Region: Pennsylvania
Collection: Storage Gov Pub
Subject: Water quality
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Geological Survey (U.S.)
1
Barker, James L., 1936-
1
Dauphin County Conservation District (Pa.)
1
Fishel, David K.
1
Koerkle, Edward H.
1
Pennsylvania. Bureau of State Parks
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1
Pennsylvania. Department of Environmental Protection
1
Powells and Armstrong Creeks Watershed Association (Dauphin County, Pa.)
1
United States. Army. Corps of Engineers. Philadelphia District
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