@book{25911,
	author = {Chapin, Theodore Sheffield,},
	title = {The Nelchina-Susitna region, Alaska,},
	publisher = {Govt. print. off.,},
	year = {1918.},
	series = {U.S. Geological survey. Bulletin 668},
	address = {Washington,},
	note = {At head of title: Department of the interior.}
}