Não informado. (1949). Air university periodical index. University Library, Maxwell Air Force Base.
Lua i Stíl Chicago (17ú heag.)Não informado. Air University Periodical Index. Montgomery, Ala: University Library, Maxwell Air Force Base, 1949.
Lua MLA (8ú heag.)Não informado. Air University Periodical Index. University Library, Maxwell Air Force Base, 1949.
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