This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
531210Full Citation: Bing Crosby, stage, screen and radio star, sings to Allied troops at the opening of the London stage door canteen in Piccadilly, London, England.; 8/31/1944; Records of the Office of the Chief Signal Officer, Record Group 111. [Online Version, https://www.docsteach.org/documents/document/bing-crosby-stage-screen-and-radio-star-sings-to-allied-troops-at-the-opening-of-the-london-stage-door-canteen-in-piccadilly-london-england, May 15, 2024]