@book{27441,
	author = {Staack, J. G.},
	title = {Spirit leveling in Vermont, 1896-1935.},
	publisher = {U.S. Govt. print. off.,},
	year = {1938.},
	series = {U.S. Geological survey. Bulletin 888},
	address = {Washington,},
	note = {At head of title: United States Department of the interior.}
}