ISBN 978-0-9635486-1-0== External links ==* nycsubway.org — Happy World Artwork by Ik-Joong Kang (1998)* Station Reporter — 7 Train* The Subway Nut — Main Street-Flushing Pictures* MTA's Arts For Transit — Flushing – Main Street (IRT Flushing Line)* Main Street entrance from Google Maps Street View* Eastern entrance on Roosevelt Avenue from Google Maps Street View
* nycsubway.org — Main Street/Flushing* nycsubway.org — Happy World Artwork by Ik-Joong Kang (1998)* Station Reporter — 7 Train* MTA’s Arts For Transit — Flushing – Main Street (IRT Flushing Line)* Main Street entrance from Google Maps Street View* Eastern entrance on Roosevelt Avenue from Google Maps Street View