@book{20206,
	author = {Kirkwood, J. E.},
	title = {The conifers of the northern Rockies,},
	publisher = {Govt. print. off.,},
	year = {1918.},
	series = {[U.S.] Bureau of education. Bulletin,},
	address = {Washington,},
	note = {At head of title: Department of the interior ...}
}