Virginia, It seems there is a formular to determine the year of a persons birth by the census reports. For Example" I have a greatgrandmother Ella Nora Green Bn. 8-4-1883 and Dd. 2-9-1969. Her husband James Walter Terry Dd. 8-21-1941. According the 1920 Census-Mitchell Township, Aulander Town: shows Terry, J.W. head/M/W/40/M. How would I establish his Date of Birth? Thanks, Jim