K. J. Hageman, Hafner, W. D., Campbell, D. H., Jaffe, D. A., Landers, D. H., and Simonich, S. L. Massey,
“Variability in Pesticide Deposition and Source Contributions to Snowpack in Western U.S. National Parks”,
Environmental Science & Technology, vol. 44, no. 12, pp. 4452 - 4458, 2010.