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Southeastern Massachusetts Metropolitan Planning Organization and Southeastern Regional Planning and Economic Development District (2012). "Commuter Rail"(PDF). 2012 Regional Transportation Plan. Archived from the original(PDF) on October 16, 2013.
Southeastern Massachusetts Metropolitan Planning Organization and Southeastern Regional Planning and Economic Development District (2012). "Commuter Rail"(PDF). 2012 Regional Transportation Plan. Archived from the original(PDF) on October 16, 2013.