Columbia subject headings:
Harvard subject headings:
Industries--Germany--Westphalia.
Lathers (Building trades)--Germany--North Rhine-Westphalia.
Turning (Lathe work)
Woodwork--Germany--Westphalia.
Woodworking industries--Germany--North Rhine-Westphalia.
Princeton subject headings:
Lathers (Building trades)--Germany (West)--Westphalia.
Turning (Lathe work)--History--20th century.