Robert Manning Burkhart
1919 - 1989 (70 years)Drag or scroll to see more of the chart.
Newton Hartman
1867-
1867-
Daisy
1872-
1872-
Loran Mattress Burkhart
1893-1964
1893-1964
Hazel Hartman
1901-
1901-
Robert Manning Burkhart
1919-1989
1919-1989