@article {PIE180,
	title = {Global N removal by freshwater aquatic systems A spatially distributed, within-basin approach},
	journal = {Global Biogeochemical Cycles},
	volume = {22},
	year = {2008},
	note = {PI Plum Data},
	keywords = {disturbance, inorganic nitrogen, LTER-PIE, nitrogen removal, watershed},
	doi = {10.1029/2007GB002963},
	author = {Wollheim, W.M. and Vorosmarty, C.J. and Bouwman, A.F. and Green, P.A. and Harrison, J. and Linder, E. and Peterson, B.J. and Green, P.A. and Seitzinger, S. and Syvitski, J.P.M.}
}
@article {PIE99,
	title = {Pre-industrial and contemporary fluxes of nitrogen through rivers: A global assessment based on typology},
	journal = {Biogeochemistry},
	volume = {68},
	year = {2003},
	note = {PI Synthesis},
	pages = {1-35},
	keywords = {anthropogenic loading, global, inorganic nutrients, LTER-PIE, nitrogen, nitrogen budget, nitrogen yields, rivers, watershed},
	doi = {10.1023/B:BIOG.0000025742.82155.92},
	author = {Green, P.A. and Vorosmarty, C.J. and Meybeck, M. and Galloway, J.N. and Peterson, B.J. and Boyer, E.W.}
}
