1939 Senate Bill 0607. Resolve Establishing A Special Unpaid Commission For The Purpose Of Investigating The Possibilities Of Coordinating Transportation Facilities In And Around The Metropolitan Boston Area And The Advisability Of Extending The Rapid Transit System In The City Of Boston From The South Station To The Readville District Of Said City, And Relative To The Railroad Transportation Facilities Within The Commonwealth, With A View Of Determining What Action Should Be Taken To Assure Continued Transportation Service For The Communities Served By Certain Railroad Lines, Particularly Commuting Passenger Service, So Called.