Columbia subject headings:
Harvard subject headings:
Aerial photography--Germany--History.
Aerial reconnaissance, German--History.
Cameras--Germany--Design and construction--History.
Photography, Military--Germany--History.
War photography--Germany--History.
World War, 1914-1918--Photography.
Princeton subject headings:
Aerial photography--Germany--History.
Aerial reconnaissance, German--History.
Cameras--Germany--Design and construction--History.
Photography, Military--Germany--History.
War photography--Germany--History.
World War, 1914-1918--Photography.