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Harris, Charles; Kreeger, Danielle; Patrick, Ruth; Palms, John (May 2015). "Twenty-five Years of Environmental Radionuclide Concentrations near a Nuclear Power Plant". Health Physics. 108 (5): 503–513. doi:10.1097/hp.0000000000000266. ISSN0017-9078. PMID25811148. S2CID205637858.
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Harris, Charles; Kreeger, Danielle; Patrick, Ruth; Palms, John (May 2015). "Twenty-five Years of Environmental Radionuclide Concentrations near a Nuclear Power Plant". Health Physics. 108 (5): 503–513. doi:10.1097/hp.0000000000000266. ISSN0017-9078. PMID25811148. S2CID205637858.
U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National MapArchived March 29, 2012, at the Wayback Machine, accessed August 8, 2011
"Civil War Timeline" The main bridge across the Susquehanna was burnt by the townspeople of Columbia, Pennsylvania, Lancaster County, in order to stop the advancing Confederates, who were encamped in Wrightsville, York County. Archived October 14, 2014, at the Wayback Machine, National Park Service
Skrapits, Elizabeth (March 12, 2011). "Winter flood slams Shickshinny". The Citizens' Voice. Archived from the original on March 15, 2011. Retrieved March 18, 2011.
Harris, Charles; Kreeger, Danielle; Patrick, Ruth; Palms, John (May 2015). "Twenty-five Years of Environmental Radionuclide Concentrations near a Nuclear Power Plant". Health Physics. 108 (5): 503–513. doi:10.1097/hp.0000000000000266. ISSN0017-9078. PMID25811148. S2CID205637858.