@article {31698,
	title = {The growth of planted spruce in Alberta. In : Proceedings of the Root Form of Planted Trees Symposium, Victoria, B. C., E. Van Eerden and J. M. Kinghorn, editors},
	year = {1978},
	pages = {191-196},
	institution = {Canadian Forestry Service, Pacific Forestry Research Centre},
	author = {Hellum, A. K.}
}
