@article {33517,
	title = {Natural variation in merchantable stem biomass and volume among clones of Populus tremuloides Michx.},
	volume = {12},
	year = {1982},
	pages = {83-89},
	publisher = {Canadian Journal of Forest Research},
	author = {Lehn, G. A. and Higginbotham, K. O.}
}
