Columbia subject headings:
Drainage laws--Germany (West)
Local taxation--Law and legislation--Germany (West)
Sewerage--Law and legislation--Germany (West)
Harvard subject headings:
Drainage laws--Germany (West)
Local taxation--Law and legislation--Germany (West)
Sewage disposal--Law and legislation--Germany.
Sewerage--Law and legislation--Germany (West)
Water-supply--Law and legislation--Germany.
Princeton subject headings: