Pilots Finn Bakke (d. 25 February 1945), Reidar Keim, Carl Sejersted Bødtker and Ola Gert Aanjesen
Unknown author<span style="display: none;">Unknown author</span>
before 25 February 1945
Jon Tvedte: Flyvningen - det moderne eventyr. Oslo, 1958 (Book in Norwegian)