@book{24949,
	author = {Marshall, R. B.},
	title = {Results of spirit leveling in Maine, New Hampshire, and Vermont, 1896 to 1909, inclusive. /},
	publisher = {Govt. Print. Off.,},
	year = {1910.},
	series = {U.S. Geological survey. Bulletin 437},
	address = {Washington,},
	note = {Includes index.}
}