TY  - RPRT
TI  - Effects of backpacker use, pack stock trail use, and pack stock grazing on water-quality indicators, including nutrients, E. coli, hormones, and pharmaceuticals, in Yosemite National Park, USA
AU  - Harrison Forrester
AU  - David W. Clow
AU  - James W. Roche
AU  - Alan Heyvaert
AU  - William A. Battaglin
PY  - 2017
DO  - 10.1007/s00267-017-0899-z
UR  - https://pubs.usgs.gov/publication/70190536
ID  - 70190536
ER  -