@book{25906,
	author = {Leffingwell, Ernest de Koven,},
	title = {The Canning River region, northern Alaska,},
	publisher = {Govt. print. off.,},
	year = {1919.},
	series = {United States. Geological survey. Professional paper 109},
	address = {Washington,},
	note = {At head of title: Department of the interior.}
}