Kopera, J. P. & Nathan, S. A. Land area potentially affected by sea level rise along the Massachusetts coast. Open-File Report (2006). at <http://www.geo.umass.edu/stategeologist/>

Historical Cadastral Maps and Illustrations. at <http://www.historicmapworks.com/>

MassGIS. at <http://www.mass.gov/anf/research-and-tech/it-serv-and-support/application-serv/office-of-geographic-information-massgis/>

National Geodetic Survey Data Explorer. at <http://www.ngs.noaa.gov/NGSDataExplorer/>

Recent USGS Publications for Massachusetts. at <http://pubs.er.usgs.gov/#search:advance/page=1/page_size=100/title=Massachusetts:0>