Columbia subject headings:
Harvard subject headings:
Industrial archaeology--Germany--North Rhine-Westphalia--History--21st century--Congresses.
Industrial buildings--Conservation and restoration--Germany--North Rhine-Westphalia--History--21st century--Congresses.
Industrial museums--Educational aspects--Germany--North Rhine-Westphalia--History--21st century--Congresses.
Industrial museums--Germany--North Rhine-Westphalia--History--21st century--Congresses.
Industries--Social aspects--Germany--North Rhine-Westphalia--History--21st century--Congresses.
Princeton subject headings:
Architecture, Industrial--Germany--North Rhine-Westphalia.