@article {32383,
	title = {Aspen biomass productivity - genotype versus phenotype. In : B. P. Dancik and K. O. Higginbotham, eds., Proc. Sixth North Am. For. Biol. Workshop, August 11-13, 1980, Edmonton, Alberta},
	year = {1980},
	institution = {Soc. Am. For.},
	address = {Bethesda, MD},
	author = {Lehn, G.}
}
