"Ulykke." . . "Ulykke" . "Luftskibe." . . "Luftskibe" . "Havari." . . "Havari" . "Udvikling." . . "Udvikling" . . . . . . . . . . . . "Beretter om udviklingen af luftskibe og beskriver flere luftskibsulykker." . "Ships in the sky" . . "History" . . . . . . "Ships in the Sky. [On airships. With plates.]"@en . "Ships in the Sky. [On airships. With plates.]" . "Ships in the sky. [The story of dirigibles, of their great flights and of their disastrous ends. With plates, including portraits.]"@en . . . .