Elkus-Manfredi/HDR Engineering; Epsilon Associates, Inc (February 2002). Draft Environmental Assessment(PDF). Massachusetts Bay Transportation Authority. Archived from the original(PDF) on January 8, 2006.
Elkus-Manfredi/HDR Engineering; Epsilon Associates, Inc (February 2002). Draft Environmental Assessment(PDF). Massachusetts Bay Transportation Authority. Archived from the original(PDF) on January 8, 2006.