Columbia subject headings:
Florence (Italy)--Imprints.
Incunabula--Italy--Florence--Bibliography.
Printing--Italy--Florence--History--Origin and antecedents.
Harvard subject headings:
Florence (Italy)--Imprints.
Incunabula--Italy--Florence--Bibliography.
Printing--Italy--Florence--History--Origin and antecedents.
Princeton subject headings:
Incunabula--Bibliography.
Rare books--Italy--Florence--Bibliography.