"United States World War I Draft Registration Cards, 1917-1918," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K68V-1SJ : accessed 11 Oct 2013), Pervus Brandt, 1917-1918; citing Chicago City no 21, Illinois, United States, NARA microfilm publication M1509, (Washington D.C.: National Archives and Records Administration, n.d); FHL microfilm 1493567.