Kilder |
- [S208] KB Sankt Johannes, København, 1892-1893.f. Ops. 21 (S. 20).
- [S463] The Church of Jesus Christ of Latter-day Saints, FamilySearch, (https://www.familysearch.org), 7 jun. 2023, https://www.familysearch.org/ark:/61903/1:1:JJLN-V2Z.
"New York Passenger Arrival Lists (Ellis Island), 1892-1924", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:JJLN-V2Z : 2 March 2021), Sigurd Madsen, 1911.
- [S463] The Church of Jesus Christ of Latter-day Saints, FamilySearch, (https://www.familysearch.org), https://www.familysearch.org/ark:/61903/1:1:XKGX-8LY.
"Illinois, Northern District Naturalization Index, 1840-1950," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XKGX-8LY : 2 March 2021), Sigurd Friis Madsen, 1919; citing Illinois, NARA microfilm publication M1285 (Washington D.C.: National Archives and Records Administration, n.d.), roll 120; FHL microfilm 1,432,120.
- [S463] The Church of Jesus Christ of Latter-day Saints, FamilySearch, (https://www.familysearch.org), https://www.familysearch.org/ark:/61903/1:1:K6DJ-CQW.
"United States World War I Draft Registration Cards, 1917-1918", database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:K6DJ-CQW : 30 December 2021), Sigurd Friis Madsen, 1917-1918.
- [S463] The Church of Jesus Christ of Latter-day Saints, FamilySearch, (https://www.familysearch.org), https://www.familysearch.org/ark:/61903/1:1:MJQC-3FJ.
"United States Census, 1920", database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MJQC-3FJ : 1 February 2021), Hulga Madsen in entry for Sigmund Madsen, 1920.
- [S463] The Church of Jesus Christ of Latter-day Saints, FamilySearch, (https://www.familysearch.org), 7 jun. 2023, https://www.familysearch.org/ark:/61903/1:1:XS59-PKH.
"United States Census, 1930," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:XS59-PKH : accessed 7 June 2023), Helga Madsen in household of Sigurd F Madsen, Chicago (Districts 1501-1750), Cook, Illinois, United States; citing enumeration district (ED) ED 1560, sheet 14B, line 100, family 218, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 483; FHL microfilm 2,340,218.
- [S463] The Church of Jesus Christ of Latter-day Saints, FamilySearch, (https://www.familysearch.org), 7 jun. 2023, https://www.familysearch.org/ark:/61903/1:1:QKDF-NRZQ.
"United States Passport Applications, 1795-1925," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKDF-NRZQ : 16 March 2018), Sigurd Früs Madsen, 1921; citing Passport Application, , source certificate #10841, Passport Applications, January 2, 1906 - March 31, 1925, 1544, NARA microfilm publications M1490 and M1372 (Washington D.C.: National Archives and Records Administration, n.d.).
- [S463] The Church of Jesus Christ of Latter-day Saints, FamilySearch, (https://www.familysearch.org), 7 jun. 2023, https://www.familysearch.org/ark:/61903/1:1:N7ZS-L9K.
"Illinois, Cook County Marriages, 1871-1968", database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:N7ZS-L9K : 25 January 2023), Sigurd F. Madsen and Helga Heidmann, 1914.
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