Columbia subject headings:
Accord and satisfaction--Congresses.
Accord and satisfaction--Switzerland--Congresses.
Law and art--Congresses.
Law and art--Switzerland--Congresses.
Taxation--Law and legislation--Congresses.
Taxation--Law and legislation--Switzerland--Congresses.
Harvard subject headings:
Art--Dating--Congresses.
Gifts--Taxation
Law and art--Congresses.
Law and art--Switzerland--Congresses.
Tariff on works of art--Congresses.
Tariff on works of art--Switzerland--Congresses.
Princeton subject headings: