@book{25164,
	author = {Marshall, R. B. and Geological Survey of Alabama.},
	title = {Results of spirit leveling in Alabama, 1911.},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1912.},
	series = {U.S. Geological survey. Bulletin 517},
	address = {Washington,},
	note = {Work done in cooperation with State of Alabama through the Geological Survey of Alabama, Eugene A. Smith, State geologist.}
}