Part of a scrapbook related to Edward I. Sproull's military career during and after World War I, circa 1916-1919.Creation Datecirca 1917-1919SubjectWorld War, 1914-1918Original Formatphotographic printsBibliographic CitationThe Edward I. Sproull Photograph Album/The Museum of FlightRightsNo copyright - United StatesLicense
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[Dugout entrances], [2011-03-07_image_332]. Museum of Flight Digital Collections, accessed 13/01/2026, https://digitalcollections.museumofflight.org/nodes/view/14772
