[1] History of Pomerania, Wikipedia
[2] Kingdom of Prussia, Wikipedia
[3] Free State of Prussia, Wikipedia
[4] hinterpommern.de/ -and- Google Maps
[5] www.kartenmeister.com/preview/City.asp?CitNum=10914
[6] Poberow und Vorwerk Sagemühl, Die Dörfer des Kreises Rummelsburg (in German)
[7] “Family of Henrich Herritz” - Monica M. Herritz, Grimm Book Bindery, 2004, Page 245.
[8] Zettin, Die Dörfer des Kreises Rummelsburg (in German)
[9] “Family of Henrich Herritz” - Page 6.
[10] Zion Lutheran Stone Church Records, Westfield Township, Sauk County, Wisconsin, 1889.

- www.familysearch.org
- www.ancestry.com
- Cemetery Records Online
- Find A Grave
- Hamilton East Public Library - in Fishers and Noblesville, IN
- Heritage Quest Online - many public libraries have this service included with their online access.
- Polk City Directory, Benton Harbor, 1940
- www.library.wisc.edu/etext/ravenstein/
- Zion Lutheran Stone Church Cemetery - on the WIGenWeb.org site
- Society for German Genealogy in Eastern Europe
- www.pomeranianews.com
- Pommern.org (in German)
- en.gemeinde.poberow.kreis-rummelsburg.de/ (in German)