-
geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:1948943
-
www.sharylscabin.com/Allamakee/cemetery/Zalmona.htm (28 Nov 2012)
-
www.sharylscabin.com/Allamakee/cemetery/cemnotes2.htm#Zalmona (25 Mar 2013)
-
iowagravestones.org/cemetery_list.php?CID=3&cName=Zalmona (1 May 2013)