Columbia subject headings:
Harvard subject headings:
Alberswil (Switzerland)--Antiquities.
Castles--Switzerland--Alberswil--History.
Excavations (Archaeology)--Switzerland--Alberswil--History.
Schloss Kastelen (Alberswil, Switzerland)--History.
Princeton subject headings:
Alberswil (Switzerland)--Antiquities.
Castles--Switzerland--Alberswil--History.
Excavations (Archaeology)--Switzerland--Alberswil--History.
Schloss Kastelen (Alberswil, Switzerland)--History.