Barosh, P. J. Preliminary bedrock geologic Map of the Webster quadrangle, Massachusetts. Open-File Report (2009).

Barosh, P. J., Fahey, R. J. & Pease, Maurice Henry, J. Preliminary compilation of the bedrock geology of the land area of the Boston 2 degree sheet, Massachusetts, Connecticut, Rhode Island and New Hampshire. USGS Open File Report (1977). at <http://pubs.er.usgs.gov/publication/ofr77285>