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PER ARDUA: The Rise of British Air Power 1911—1939 PER ARDUA: The Rise of British Air Power 1911—1939
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1915 Mapping the enemy's defences. Holding a conical camera (5" x 4" plate-glass negative), leaning over the side of the aeroplane (in flight) to take photographs of the German positions. Ten operations required to take each photograph following the first. Talk about skill!
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PER ARDUA: The Rise of British Air Power 1911—1939