@article {2703,
	title = {Rhytisma acerinum as a biological indicator of pollution},
	journal = {Environmental Pollution},
	volume = {10},
	year = {1976},
	pages = {271-285},
	issn = {00139327},
	doi = {10.1016/0013-9327(76)90009-4},
	url = {http://linkinghub.elsevier.com/retrieve/pii/0013932776900094},
	author = {Bevan, R.J. and Greenhalgh, G.N.}
}
