Columbia subject headings:
Biblioteca apostolica vaticana. Archivio avignonese.
Bibliotheca Romanorum Pontificum Avenionensis.
Harvard subject headings:
Princeton subject headings:
Biblioteca apostolica vaticana--Catalogs.
Catholic Church. Pope--Libraries--History.
Library catalogs--France--Avignon.
Library catalogs--Vatican City.
Popes--Library resources.