@mastersthesis {48651,
	title = {Effects of nitrogen, pH, and mycorrhizal fungi on the growth, water relations, and physiology of trembling aspen (Populus tremuloides) and balsam poplar (Populus balsamifera)},
	volume = {Renewable Resources},
	year = {2008},
	pages = {252},
	address = {University of Alberta},
	url = {http://search.proquest.com/docview/304410751},
	author = {Siemens, Joia  Aurea}
}
