@article {PIE138,
	title = {N budgets and aquatic uptake in the Ipswich River basin, northeastern Massachusetts.},
	journal = {Water Resources Research},
	volume = {40},
	number = {11},
	year = {2004},
	note = {PD Plum Data},
	pages = {1-12},
	keywords = {anthropogenic, land use, LTER-PIE, nitrogen, uptake, water quality},
	doi = {10.1029/2004WR003172},
	author = {Williams, M. and Hopkinson, C. and Rastetter, E. and Vallino, J.}
}
@article {PIE39,
	title = {Modeling the effects of land-use change on nitrogen biogeochemistry in the Ipswich watershed, Massachusetts},
	journal = {Biological Bulletin},
	volume = {199},
	number = {2},
	year = {2000},
	note = {REU},
	pages = {218-219},
	keywords = {Ipswich River, land use, LTER-PIE, model, nitrogen},
	doi = {10.2307/1542907},
	author = {Kirkby, R. and Claessens, L. and Hopkinson, Jr., C. and Rastetter, E. and Vallino, J.}
}
