@book{24612,
	author = {Fenneman, Nevin Melancthon, and Gale, Hoyt S.},
	title = {The Yampa coal field, Routt county, Colorado /},
	publisher = {Govt. Print. Off.,},
	year = {1906.},
	series = {U.S. Geological survey. Bulletin},
	address = {Washington,},
	note = {Subject series: A, Economic geology, 84; B, Descriptive geology, 104.}
}