Columbia subject headings:
Bianchi, Gerardo, approximately 1220-1302.
Cardinals--Italy--Biography.
Catholic Church--Italy--Parma--History--13th century.
Harvard subject headings:
Bianchi, Gerardo, approximately 1220-1302.
Cardinals--Italy--Biography
Italy--Church history--476-1400.
Princeton subject headings:
Bianchi, Gerardo, d. 1302.
Cardinals--Italy--Biography.
Catholic Church--Italy--Parma--History--13th century.