Columbia subject headings:
Customs administration--Law and legislation--Europe--Congresses.
Tax administration and procedure--Europe--Congresses.
Harvard subject headings:
Civil rights--Europe--Congresses
Tax administration and procedure--Europe--Congresses.
Tax evasion--Europe--Congresses.
Princeton subject headings:
Civil rights--Europe--Congresses.
Tax administration and procedure--Europe--Congresses.
Tax evasion--Europe--Congresses.