Columbia subject headings:
Cultural property--Protection--Italy--Emilia-Romagna--Congresses.
Industrial archaeology--Italy--Emilia-Romagna--Congresses.
Industries--Italy--Emilia-Romagna--History--Sources--Congresses.
Harvard subject headings:
Cultural property--Protection--Italy--Emilia-Romagna--Congresses.
Industrial archaeology--Italy--Emilia-Romagna--Congresses.
Industries--Italy--Emilia-Romagna--History--Sources--Congresses.
Princeton subject headings: