"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9L2-FDH : accessed 15 July 2019), Joseph Novak in household of Frank Novak, YorkTownship Elberon town, Tama, Iowa, United States; citing enumeration district (ED) 148, sheet 1A, family 10, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,460.
"United States World War I Draft Registration Cards, 1917-1918," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KZ2K-C2M : 13 March 2018), Joseph Novak, 1917-1918; citing Tama County, Iowa, United States, NARA microfilm publication M1509 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,643,357.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JLLS-H31 : 20 May 2014), Joseph Novak, Feb 1971; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
"Iowa, County Marriages, 1838-1934," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XJDN-47W : 20 September 2017), Joseph Novak and Emma Blazek, 09 May 1905, Elberon, Iowa, United States; citing reference Vol 3 p 19, county courthouses, Iowa; FHL microfilm 1,022,738.