@mastersthesis {32107,
	title = {Natural variation in merchantable stem biomass among clones of trembling aspen},
	volume = {Forest Science},
	year = {1979},
	address = {University of Alberta},
	keywords = {Populus},
	url = {http://search.proquest.com/docview/302989016},
	author = {Lehn, Gordon A.}
}
