Não informado. (1945). American helicopter. American Helicopter Magazine.
Lua i Stíl Chicago (17ú heag.)Não informado. American Helicopter. New York: American Helicopter Magazine, 1945.
Lua MLA (8ú heag.)Não informado. American Helicopter. American Helicopter Magazine, 1945.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.