@book{37809,
	author = {National Arboretum (U.S.) and American Horticultural Society.},
	title = {Plant hardiness zone map /},
	publisher = {Agricultural Research Service,},
	year = {[1965]},
	series = {Miscellaneous publication ;},
	address = {Washington, D.C. :},
	edition = {Rev. 1965.},
	note = {Also shows southern Canada.}
}