@article {32776,
	title = {The influence of three sour gas processing plants on the ecological distribution of epiphytic lichens in the vicinity of Fox Creek and Whitecourt, Alberta, Canada},
	volume = {14},
	year = {1980},
	pages = {45-68},
	publisher = {Water, Air, \& Soil Pollution},
	url = {http://www.springerlink.com/content/w64163m513763g38/fulltext.pdf},
	author = {Case, James W.}
}
