Delta Air Lines System Timetable 1936 September 18
MLA
Delta Air Corporation. "Delta Air Lines System Timetable 1936 September 18." Delta Flight Museum. 1936-09-18, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19360918.
APA
Delta Air Corporation (1936-09-18). Delta Air Lines System Timetable 1936 September 18. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19360918
Chicago
Delta Air Corporation. "Delta Air Lines System Timetable 1936 September 18." 1936-09-18. May 8, 2026. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19360918.
