@article {278,
	title = {The nitrogen content of upland rivers in Britain: the significance of organic N},
	journal = {IAHS Publ.},
	volume = {248},
	year = {1998},
	pages = {443-450},
	author = {Chapman, P.J. and Edwards, A.C. and Reynolds, C. and Cresser, M. and Neal, C.}
}
