Columbia subject headings:
Harvard subject headings:
Antiquities--Collection and preservation--Congresses
Cultural geography--Congresses.
Cultural geography--Switzerland--Congresses.
Cultural landscapes--Congresses.
Cultural landscapes--Switzerland--Congresses.
Historic preservation--Congresses
Historic preservation--Switzerland--Congresses.
Princeton subject headings:
Antiquities--Collection and preservation--Congresses.
Cultural geography--Congresses.
Cultural geography--Switzerland--Congresses.
Cultural landscapes--Congresses.
Cultural landscapes--Switzerland--Congresses.
Historic preservation--Congresses.
Historic preservation--Switzerland--Congresses.