Columbia subject headings:
Information storage and retrieval systems--Law--Europe--Congresses.
Law--Europe--Data processing--Congresses.
Recording and registration--Europe--Data processing--Congresses.
Harvard subject headings:
Information storage and retrieval systems--Law--Europe--Congresses.
Recording and registration--Europe--Data processing--Congresses.
Princeton subject headings:
Information storage and retrieval systems--Law--Europe--Congresses.
Recording and registration--Europe--Data processing--Congresses.