@mastersthesis {32717,
	title = {Soil acidification by emitted sulphur in the Athabasca oil sands area},
	volume = {Soil Science},
	year = {1980},
	pages = {137},
	address = {University of Alberta},
	url = {http://search.proquest.com/docview/303116799},
	author = {Yeung, Paul Yuk Po}
}
