Columbia subject headings:
Incunabula--Bibliography.
Incunabula--Italy--Bibliography.
Piedmont (U.S. : Region)--Imprints.
Printers--Italy--Piedmont.
Harvard subject headings:
Incunabula--Bibliography.
Piedmont (Italy)--Imprints.
Princeton subject headings:
Catalogs.
Incunabula--Bibliography.
Piedmont (Italy)--Imprints--Catalogs.