http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
National Advisory Committee for Aeronautics.
7 pages, 3 unnumbered leaves of plates : illustrations ; 27 cm.
"From The Aeroplane, July 8, 1931, and Flight, July 10, 1931."--P. [1].