Detail
Type D. - Unterdorf is a Dorf (Village).
A Heidelberg - The Amtsbezirk for Unterdorf is Heidelberg. The Amtsbezirk is the District Office.
See Wilhelmsfeld - A See notation means the entry is dependent on another entry. In this case, Unterdorf is dependent on Wilhelmsfeld, which should be consulted for additional information.