Columbia subject headings:
Planning--Law and legislation--Austria--Congresses.
Planning--Law and legislation--Germany (West)--Congresses.
Public law--Austria--Congresses.
Public law--Germany (West)--Congresses.
Rule of law--Congresses.
Harvard subject headings:
Planning--Law and legislation--Austria--Congresses.
Planning--Law and legislation--Germany (West)--Congresses.
Public law--Austria--Congresses.
Public law--Germany (West)--Congresses.
Rule of law--Congresses
Princeton subject headings: