Columbia subject headings:
Incunabula--Italy--Milan--Bibliography.
Milan (Italy)--Imprints.
Printing--Italy--Milan--History--Origin and antecedents.
Harvard subject headings:
Incunabula--Bibliography.
Milan (Italy)--Imprints.
Printing--Italy--Milan--History--15th century.
Princeton subject headings:
Incunabula--Bibliography.
Milan (Italy)--Imprints.
Printing--History--Italy--Milan.