Columbia subject headings:
Harvard subject headings:
Museo dell'Opera del Duomo (Orvieto, Italy)--Catalogs.
Tesserae--Italy--Orvieto--Catalogs.
Tokens--Italy--Orvieto--Catalogs.
Princeton subject headings:
Catalogs.
Museo dell'Opera del Duomo (Orvieto, Italy)--Catalogs.
Tesserae--Italy--Orvieto--Catalogs.
Tokens--Italy--Orvieto--Catalogs.