Columbia subject headings:
Excavations (Archaeology)--Austria--Semmering (Lower Austria)
Semmering (Lower Austria, Austria)--Antiquities.
Semmering (Lower Austria, Austria)--History.
Harvard subject headings:
Excavations (Archaeology)--Austria--Semmering (Lower Austria)
Historic buildings--Austria--Semmering (Lower Austria)
Semmering (Lower Austria, Austria)--Antiquities.
Semmering (Lower Austria, Austria)--History.
Princeton subject headings: