www.nyctransitforums.com/topic/54217-191st-street-1-subway-station-tour-subway-passageway-deepest-station-in-nyc/
www.facebook.com/nytransitmuseum/posts/the-191st-street-station-on-the-irt-broadway-seventh-avenue-line-opened-in-1911-/10157890326793843/
https://new.mta.info/system_modernization/uptownelevators
www.nycsubway.org/wiki/IRT_West_Side_Line3191st_Street
www.nyc.gov/html/dot/downloads/pdf/2015-03-191st-st-tunnel-beautification-rfq.pdf
www.untappedcities.com/2013/06/26/deepest-highest-subway-stations-nyc/
https://en.wikipedia.org/wiki/191st_Street_station