Delta Air Lines System Timetable 1941 September 15
MLA
Delta Air Corporation. "Delta Air Lines System Timetable 1941 September 15." Delta Flight Museum. 1941-09-15, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19410915.
APA
Delta Air Corporation (1941-09-15). Delta Air Lines System Timetable 1941 September 15. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19410915
Chicago
Delta Air Corporation. "Delta Air Lines System Timetable 1941 September 15." 1941-09-15. July 22, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19410915.
