@book{242993,
	author = {Benedict, Audrey D. and Sierra Club.},
	title = {A Sierra Club naturalist's guide to the southern Rockies},
	publisher = {Sierra Club Books},
	year = {c1991.},
	address = {San Francisco},
	note = {Cover title: A Sierra Club naturalist's guide. The southern Rockies.},
	url = {http://www.loc.gov/catdir/description/random046/89010569.html}
}