Columbia subject headings:
Bulls, Papal--History.
Canon law.
Formalities (Law)--History.
Popes--Primacy--History of doctrines.
Signature (Law)--History.
Harvard subject headings:
Bulls, Papal--History.
Canon law.
Formalities (Law)--History.
Popes--Primacy--History of doctrines.
Signature (Law)--History.
Princeton subject headings: