Columbia subject headings:
Landscape protection--Law and legislation--Switzerland.
Monuments--Conservation and restoration--Switzerland.
Natural monuments--Law and legislation--Switzerland.
Harvard subject headings:
Landscape protection--Law and legislation--Switzerland.
Monuments--Conservation and restoration--Switzerland.
Natural monuments--Law and legislation--Switzerland.
Princeton subject headings:
Landscape protection--Law and legislation--Switzerland.
Monuments--Switzerland--Conservation and restoration.
Natural monuments--Law and legislation--Switzerland.