Ancestry.com, Web: Minnesota, Naturalization Index, 1849-1985 (Lehi, UT, USA: Ancestry.com Operations, Inc., 2016).

• Titel	Ancestry.com, Web: Minnesota, Naturalization Index, 1849-1985 (Lehi, UT, USA: Ancestry.com Operations, Inc., 2016).
  Kurztitel	Web: Minnesota, Naturalization Index, 1849-1985
  Aufbewahrungsort	Ancestry.com
  Quellen-Kennung	S575
  Text	Naturalization Records. Iron Range Research Center. http://www.ironrangeresearchcenter.org/search/: accessed 7 March 2016.
  Verknüpft mit Personen: 1	KOLBE, John Wilhelm