"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M2LN-GTF : accessed 24 Nov 2014), Ewald Sauer in household of Ernest Sauer, New Ulm Ward 2, Brown, Minnesota, United States; citing enumeration district (ED) 47, sheet 15A, family 323, NARA microfilm publication T624, National Archives and Records Administration, Washington, D.C.; FHL microfilm 1374704.
"United States World War I Draft Registration Cards, 1917-1918", index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K87D-ZNW : accessed 24 Nov 2014), Ewald T Sauer, 1917-1918.
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