Detail
Type Wlr. - Gassau is a Weiler (Farm or Small Village).
BA Vilsbiburg - The Bezirksamt for Gassau is Vilsbiburg. The Bezirksamt is the District Office.
See Bonbruck - A See notation means the entry is dependent on another entry. In this case, Gassau is dependent on Bonbruck, which should be consulted for additional information.