Delta Air Lines System Timetable 1937 August 16
MLA
Delta Air Corporation. "Delta Air Lines System Timetable 1937 August 16." Delta Flight Museum. 1937-08-16, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19370816.
APA
Delta Air Corporation (1937-08-16). Delta Air Lines System Timetable 1937 August 16. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19370816
Chicago
Delta Air Corporation. "Delta Air Lines System Timetable 1937 August 16." 1937-08-16. July 29, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19370816.
