@article {1567,
	title = {Effects of enhanced N deposition on Cladonia portentosa; results from a field manipulation study.},
	number = {525 ISSN 0967-876X},
	year = {2004},
	pages = {51-62},
	institution = {English Nature},
	address = {Peterborough},
	author = {Sheppard, L.I. and Leith, I.D. and Crossley, A.}
}
