Columbia subject headings:
Harvard subject headings:
Historic sites--Germany--Conservation and preservation--Congresses.
Historic sites--Great Britain--Conservation and preservation--Congresses.
Industrial archaeology--Germany--Congresses.
Industrial archaeology--Germany--History.
Industrial archaeology--Great Britain--Congresses.
Industrial archaeology--Great Britain--History.
Industries--Germany--History
Industries--Germany--History--19th century--Congresses.
Industries--Germany--History--20th century--Congresses.
Industries--Great Britain--History
Industries--Great Britain--History--19th century--Congresses.
Industries--Great Britain--History--20th century--Congresses.
Princeton subject headings:
Historic sites--Germany--Conservation and preservation--Congresses.
Historic sites--Great Britain--Conservation and preservation--Congresses.
Industrial archaeology--Germany--Congresses.
Industrial archaeology--Great Britain--Congresses.
Industries--Germany--History--19th century--Congresses.
Industries--Germany--History--20th century--Congresses.
Industries--Great Britain--History--19th century--Congresses.
Industries--Great Britain--History--20th century--Congresses.