Columbia subject headings:
Harvard subject headings:
Germany--Administrative and political divisions--Periodicals.
Germany--Population--Statistics--Periodicals.
Zip codes--Germany--Periodicals.
Princeton subject headings:
Directories.
Germany (West)--Administrative and political divisions--Directories.
Germany (West)--Population--Statistics--Periodicals.
Periodicals.
Postal codes--Germany (West)--Directories.
Statistics.