Delta Air Lines System Timetable 1950 January 1
MLA
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1950 January 1." Delta Flight Museum. 1950-01-01, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19500101.
APA
Delta Air Lines, Inc. (1950-01-01). Delta Air Lines System Timetable 1950 January 1. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19500101
Chicago
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1950 January 1." 1950-01-01. July 30, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19500101.
