@article {O'Hara:1 July 1991:0885-6095:59,
	author = "O'Hara, Kevin L.",
	title = "Technical Commentary: A Biological Justification for Pruning in Coastal Douglas-Fir Stands",
	journal = "Western Journal of Applied Forestry",
	volume = "6",
	year = "1 July 1991",
	abstract = "",
	pages = "59-63(5)",
	url = "http://www.ingentaconnect.com/content/saf/wjaf/1991/00000006/00000003/art00004"
}