Columbia subject headings:
Bishops--Appointment, call, and election.
Catholic Church--History.
Election law (Canon law)
Monasticism and religious orders--Government.
Popes--Election.
Harvard subject headings:
Bishops--Appointment, call, and election--History.
Catholic Church--Bishops.
Catholic Church--Clergy--Appointment, call, and election--History.
Popes--Election
Princeton subject headings:
Catholic Church--Bishops--Appointment, call, and election--History.
Popes--Election.