Delta Air Lines System Timetable 1949 January 4
MLA
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1949 January 4." Delta Flight Museum. 1949-01-04, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19490104.
APA
Delta Air Lines, Inc. (1949-01-04). Delta Air Lines System Timetable 1949 January 4. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19490104
Chicago
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1949 January 4." 1949-01-04. July 29, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19490104.
