Annual report of the National Advisory Committee for Aeronautics (2nd) together with the message of the President of the United States transmitting the report for the fiscal year ending June 30, 1916. administrative report including technical report. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc65625/. Accessed May 24, 2013.
Annual report of the National Advisory Committee for Aeronautics (2nd) together with the message of the President of the United States transmitting the report for the fiscal year ending June 30, 1916. administrative report including technical report
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