@article {30287,
	title = {A quantitive study of epiphytic lichen vegetation in relation to SO2 pollution in western Alberta},
	volume = {Information Report NOR-X-161},
	year = {1976},
	pages = {26},
	institution = {Canadian Forestry Service, Northern Forest Research Centre},
	address = {Edmonton, AB},
	author = {Skorepa, A. C. and Vitt, D. H.}
}
