Columbia subject headings:
Confidential communications--Europe--Congresses.
Freedom of information--Europe--Congresses.
Government information--Europe--Congresses.
Harvard subject headings:
Confidential communications--Europe--Congresses.
Freedom of information--Europe--Congresses.
Government information--Europe--Congresses.
Princeton subject headings:
Freedom of information--Europe.
Secrecy--Law and legislation--Europe.