Details of 1974 map, 2003.37.17; New York Transit Museum Collection. Second Avenue Subway Grand Opening Diagram, 2017, 2020.11; New York Transit Museum Map Collection New Subway Routes, 1967, 2011.12.1, Richard Carpenter Collection; New York Transit Museum. New Subway Routes, 1967, 2011.12.1, Richard Carpenter Collection; New York Transit Museum.
