@book{229104,
	author = {U.S. Coast and Geodetic Survey.},
	title = {United States--east coast, Massachusetts, Boston Inner Harbor},
	publisher = {U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, Coast and Geodetic Survey},
	year = {1993.},
	address = {Washington, D.C.},
	note = {Depths shown by isolines and soundings.},
	url = {http://purl.fdlp.gov/GPO/gpo25687}
}