@book {620,
	title = {Tree-Ring Dates from New Mexico I,O,U Central Rio Grande Area},
	year = {1972},
	publisher = {University of Arizona},
	organization = {University of Arizona},
	address = {Tucson},
	keywords = {Archaeology, date, dendrochronology, new mexico, rio grande area, tree rings},
	author = {Robinson, William J. and Hannah, John W. and Harrill, Bruce G.}
}
@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.}
}
