Ancestry.com, 1840 United States Federal Census (Provo, UT, USA: Ancestry.com Operations, Inc., 2010).

• Titel	Ancestry.com, 1840 United States Federal Census (Provo, UT, USA: Ancestry.com Operations, Inc., 2010).
  Kurztitel	1840 United States Federal Census
  Aufbewahrungsort	Ancestry.com
  Quellen-Kennung	S505
  Text	Sixth Census of the United States, 1840. (NARA microfilm publication M704, 580 rolls). Records of the Bureau of the Census, Record Group 29. National Archives, Washington, D.C.
  Verknüpft mit	ASCHENBACH, Johannes