Columbia subject headings:
Ferrara (Italy)--Court and courtiers--History--16th century.
Vocal music--Italy--Ferrara--16th century.
Harvard subject headings:
Ferrara (Italy)--Court and courtiers--History--16th century.
Vocal music--Italy--Ferrara--16th century.
Princeton subject headings:
Ferrara (Italy)--Court and courtiers--History--16th century.
Vocal music--Italy--Ferrara--16th century.