@book {624,
	title = {Tree-Ring Dates from Arizona H-I Flagstaff Area},
	year = {1975},
	publisher = {University of Arizona},
	organization = {University of Arizona},
	address = {Tucson},
	keywords = {date, dates, dendrochronology, Flagstaff, southwest, tree ring},
	author = {Robinson, William J. and Harrill, Bruce G. and Warren, Richard L.}
}
@book {614,
	title = {Tree-Ring Dates from Arizona U-W Gila-Salt Rivers Area},
	year = {1971},
	publisher = {University of Arizona},
	organization = {University of Arizona},
	address = {Tucson},
	keywords = {dates, dendrochronology, Gila river, southwest, tree rings},
	author = {Bannister, Bryant and Robinson, William J.}
}
