@article {35950,
	title = {Foliar sulphur species in pine: a new indicator of a forest ecosystem under air pollution stress},
	volume = {55},
	year = {1988},
	pages = {15-27},
	publisher = {Environmental Pollution},
	url = {http://www.sciencedirect.com/science?_ob=MImg\&_imagekey=B75CG-48XD8Y2-8J-1\&_cdi=13010\&_user=1067473\&_orig=search\&_coverDate=04\%2F30\%2F1979\&_sk=999819995\&view=c\&wchp=dGLbVzW-zSkWA\&md5=80d24efdff6bfd4637fecef083a6ef0b\&ie=/sdarticle.pdf},
	author = {Legge, A. H. and Bogner, J. C. and Krupa, S. V.}
}
