Iver O. Penttinen2020-04-142020-04-142020-04-09https://hdl.handle.net/10735.1/7937Portrait of William Coppens dressed in uniform wearing his decorations. Image displayed (72 dpi JPEG), Master image (600 dpi TIFF).George H. Williams, Jr. World War I Aviation LibraryAir pilots, Military--United States--Biography.Military uniformsAeronautics Awards.Image4IP-PB2