Columbia subject headings:
Bishops--Italy--Milan--Biography.
Catholic Church--Bishops--Biography.
Milan (Italy)--Church history.
Visconti, Giovanni, approximately 1290-1354.
Harvard subject headings:
Bishops--Italy--Milan--Biography.
Catholic Church--Bishops--Biography.
Milan (Italy)--Church history.
Visconti, Giovanni, approximately 1290-1354.
Princeton subject headings:
Bishops--Italy--Milan--Biography.
Catholic Church--Bishops--Biography.
Milan (Italy)--Church history.
Visconti, Giovanni, approximately 1290-1354.