@article {Zobel:1956:0015-749X:107,
	author = "Zobel, Bruce and Rhodes, Robert",
	title = "Specific Gravity Estimations of Mature Loblolly Pine from Juvenile Wood and Seedling Limb Sections",
	journal = "Forest Science",
	volume = "2",
	number = "2",
	year = "1956",
	abstract = "",
	pages = "107-112",
	url = "http://www.ingentaconnect.com/content/saf/fs/1956/00000002/00000002/art00008"
}