Columbia subject headings:
Historical museums--Germany (West)
Museums--Germany (West)
Open-air museums--Germany (West)
Harvard subject headings:
Ethnological museums and collections.
Historic sites.
Historical museums--Germany (West).
Museums
Museums--Germany (West)
Open-air museums--Germany (West)
Open-air museums.
Princeton subject headings:
Ethnological museums and collections.
Historic sites.
Museums.
Open-air museums.