@article {99,
	title = {Closing the global N2O budget: a retrospective analysis 1500 - 1994},
	journal = {Global Biogeochemical Cycles},
	volume = {13},
	year = {1999},
	pages = {1-8},
	author = {Kroeze, C. and Mosier, A. and Bouwman, L.}
}
