"Luftkrieg." . . . . "flyvevåben" . . "flyvemaskiner" . . "World War I airplanes." . . "luftkrig" . . "Luftoperationer" . . "militærfly" . . "1. Verdenskrig 1914-1918" . . "aeroplanes nonfiction airplanes used in WWI between 1914 and 1918." . . "1914 - 1918" . . "piloter" . . "Piloter" . "Militärflugzeug." . . . "Heros and aeroplanes of the great war 1914 - 1918" . . . . . . . "Bildband" . . . . . "Story tracing the development of aeroplanes from the early 1900's to the deadly instrument it became during the great conflict, and the great men who flew them." . . . . . . . "Heroes and aeroplanes of the Great War, 1914-1918" . . "Heroes and aeroplanes of the Great War 1914-1918" . . . "Heroes and aeroplanes of the Great War 1914-1918. [Illustrated.]"@en . . . . . . . . . . . . . "Heroes & aeroplanes of the Great War, 1914-1918" . "Heroes & aeroplanes of the Great War, 1914-1918"@en . . . . . . "Heroes & aeroplanes of the Great War, 1914-1918. [With illustrations.]" . . . "Heroes & aeroplanes of the Great War, 1914-1918. [With illustrations.]"@en . . "Heroes & aeroplanes of the great war 1914-1918" . "Heroes & aeroplanes of the great war, 1914-1918" . . . . . "Weltkrieg (1914-1918)" . . "historie" . . "krigsfly" . . "Flytyper" . . "den 1. verdenskrig" . . "Luftkrigshistorie" . . "Esser" . .