"United States Census, 1930," database with images, Francis Forstner in household of John Forstner, St Cloud, Fond du Lac, Wisconsin, United States; citing enumeration district (ED) ED 49, sheet 4A, line 45, family 85, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2573; FHL microfilm 2,342,307.
"United States Census, 1940," database with images, Francis Forstner in household of Henry Kramer, Elkhart Lake, Elkhart Lake Village, Sheboygan, Wisconsin, United States; citing enumeration district (ED) 59-4, sheet 6A, line 32, family 132, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 4526.
"United States Social Security Death Index," database, Francis Forstner, Jun 1977; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).