Hale, R. L., N. B. Grimm, C. J. Vorosmarty and B. Fekete. 2015. Nitrogen and phosphorus fluxes from watersheds of the northeast U.S. from 1930 to 2000: Role of anthropogenic nutrient inputs, infrastructure, and runoff. Global Biogeochemical Cycles 29(3):341-356. DOI: 10.1002/2014GB004909. (link )
Hale, R. L., J. H. Hoover, C. J. Vorosmarty and W. M. Wollheim. 2011. Anthropogenic nutrient loading to the northeastern US, 1920-2000. Presentation at the 7-12 August 2011 96th Annual Meeting of the Ecological Society of America, Austin, TX.