@article {746,
	title = {Tree Rings and Chronology},
	journal = {University of Arizona Bulletin},
	volume = {VII},
	year = {1937},
	publisher = {University of Arizona},
	address = {Tucson},
	keywords = {chronology, dates, dating, Douglass, historic, tree ring},
	author = {Douglass, A.E.}
}
