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2016 [1]
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Physical, chemical, and biological characteristics of selected headwater streams along the Allegheny Front, Blair County, Pennsylvania, July 2011–September 2013 [研究报告]
10.3133/ofr20151173U.S. Geological Survey. 2016-01-01
Low, Dennis J. djlow@usgs.gov;  Brightbill, Robin A. rabright@usgs.gov;  Eggleston, Heather L. egglesto@usgs.gov;  Chaplin, Jeffrey J. jchaplin@usgs.gov
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Arsenic concentrations, related environmental factors, and the predicted probability of elevated arsenic in groundwater in Pennsylvania [研究报告]
U.S. Geological Survey. 2013-01-01
Gross, Eliza L. egross@usgs.gov;  Low, Dennis J. djlow@usgs.gov
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