Columbia subject headings:
Christian art and symbolism--France--History--Congresses.
Christian art and symbolism--Italy--History--Congresses.
Holy cards--France--History--Congresses.
Holy cards--Italy--History--Congresses.
Religious supplies industry--France--History--Congresses.
Religious supplies industry--Italy--History--Congresses.
Harvard subject headings:
Princeton subject headings:
Christian art and symbolism--France--History--Congresses.
Christian art and symbolism--Italy--History--Congresses.
Holy cards--France--History--Congresses.
Holy cards--Italy--History--Congresses.
Religious supplies industry--France--History--Congresses.
Religious supplies industry--Italy--History--Congresses.