Detail
Type Zk. - Rossau is a Zinken (Outlying Farm).
A Säckingen - The Amtsbezirk for Rossau is Säckingen. The Amtsbezirk is the District Office.
See Altenschwand 1) - A See notation means the entry is dependent on another entry. In this case, Rossau is dependent on Altenschwand 1), which should be consulted for additional information.