San Francisco : Architect and Engineer, Inc · leaf 257
Official photo, U. S. Army Signal Corps BOMBERS IN ACTION FLY BY THREES. THIS FLIGHT CONSISTS OF DOUGLAS BI8 BOMBERS (Sky Back-ground) AND BOEING BI7 FLYING FORTRESSES, SIMILAR TO MODEL ON EXHIBITION AT TREASUREISLAND. United States into nine Corps Areas. Each of lery District with headquarters at…
Architecture · Building
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![An illustration from Royal Air Force. Technical Notes. Aeroplanes M-Z. Rigging Notes [1918, Great Britain] (1918)](https://img.insideoutlibrary.com/img/200/ia-raf-riggingnotes1918-161-0.webp)