Hyer, Kenneth E. (Kenneth Edward) United States. National Park Service. Geological Survey (U.S.) text eng Includes bibliographical references (pages 18). Description based on print version record; resource not viewed. Bacterial pollution of water--Virginia--Shenandoah National Park. Drinking water--Contamination--Virginia--Shenandoah National Park. Enterobacteriaceae--Environmental aspects--Virginia--Shenandoah National Park. Escherichia coli--Environmental aspects--Virginia--Shenandoah National Park. Water--Pollution--Virginia--Shenandoah National Park. Escherichia coli concentrations in recreational streams and backcountry drinking-water supplies in Shenandoah National Park, Virginia, 2005-2006 https://hdl.loc.gov/loc.gdc/gdcebookspublic.2023693604 This is non-restricted, fully open content that may be accessed on and off of the Library of Congress campus, with no restrictions, by an unlimited number of users