@book{11845,
	author = {Froiland, Sven G.},
	title = {The genus Salix (willows) in the Black Hills of South Dakota /},
	publisher = {U.S. Dept. of Agriculture,},
	year = {1962.},
	series = {Technical bulletin / United States Department of Agriculture ;},
	address = {Washington :},
	note = {Literature cited: p. 73-74.}
}