Delta Air Lines System Timetable 1936 July 20
MLA
Delta Air Corporation. "Delta Air Lines System Timetable 1936 July 20." Delta Flight Museum. 1936-07-20, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19360720.
APA
Delta Air Corporation (1936-07-20). Delta Air Lines System Timetable 1936 July 20. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19360720
Chicago
Delta Air Corporation. "Delta Air Lines System Timetable 1936 July 20." 1936-07-20. July 24, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19360720.
