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

Forrester, H. A., Clow, D., Roche, J., 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, Environmental Management, 60 (3), 526-543