Delta Air Lines System Timetable 1939 November 5
MLA
Delta Air Corporation. "Delta Air Lines System Timetable 1939 November 5." Delta Flight Museum. 1939-11-05, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19391105.
APA
Delta Air Corporation (1939-11-05). Delta Air Lines System Timetable 1939 November 5. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19391105
Chicago
Delta Air Corporation. "Delta Air Lines System Timetable 1939 November 5." 1939-11-05. July 30, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19391105.
