Delta Air Lines System Timetable 1947 Febraury 20
MLA
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1947 Febraury 20." Delta Flight Museum. 1947-02-20, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19470220.
APA
Delta Air Lines, Inc. (1947-02-20). Delta Air Lines System Timetable 1947 Febraury 20. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19470220
Chicago
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1947 Febraury 20." 1947-02-20. July 25, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19470220.
