@article {221,
	title = {Regional and historical variation in the nitrogen-content of Racomitrium lanuginosum in Britain In relation to atmospheric nitrogen deposition},
	journal = {Environmental Pollution},
	volume = {84},
	year = {1994},
	pages = {189-196},
	author = {Baddeley, J.A. and Thompson, D.B.A. and Lee, J.A.}
}
