2019-03-192019-03-19n.d.https://repository.tcu.edu/handle/116099117/24074Letter from Frank Hawks to Amon Carter wherein Hawks tells Carter about how the helment he is sending has crossed the comtinent on a non-stop trip in February, 1921, setting a new record.8.5X11 paperPrior written permission from TCU Special Collections required to use any document or photographAviationHawks, FrankLetter re: helmetDocument