1941 Let’s Go! U.S.A. Keep ‘Em Flying! Air Corps U.S. Army

United States. Adjutant-General’s Office. Let’s go! U.S.A. : keep ’em flying!, poster, [1941]; (digital.library.unt.edu/ark:/67531/metadc505/m1/1/?q=Let%27s%20Go%21: accessed March 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.