Souvenir card from flight in a Robertson Airline plan from St. Louis Municipal Airport to New Orleans, No. 2176, no date, A0012-00003. Missouri Historical Society Library and Research Center.

Souvenir card from flight in a Robertson Airline plan from St. Louis Municipal Airport to New Orleans, No. 2176, no date, A0012-00003. Missouri Historical Society Library and Research Center. https://mohistory.mobiusconsortium.org/repositories/2/digital_objects/2972 Accessed September 19, 2024.