Delta Air Lines System Timetable 1941 July 1
MLA
Delta Air Corporation. "Delta Air Lines System Timetable 1941 July 1." Delta Flight Museum. 1941-07-01, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19410701.
APA
Delta Air Corporation (1941-07-01). Delta Air Lines System Timetable 1941 July 1. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19410701
Chicago
Delta Air Corporation. "Delta Air Lines System Timetable 1941 July 1." 1941-07-01. August 6, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19410701.
