Southern Ohio Tombstones
Photo image of the headstone Ada Zoll in Sugartree Ridge Cemetery located in Highland County.
Carl and Jo Koenig
Photos on CDs
Concord Township, Highland County, Ohio
Portsmouth Public Library
Carl and Jo Koenig, “Ada Zoll,” Local History Digital Collection, accessed October 5, 2022, https://www.yourppl.org/history/items/show/12741.