Columbia subject headings:
Harvard subject headings:
Catholic Church--Foreign relations--Portugal--History--16th century--Sources.
Catholic Church--Foreign relations--Portugal--Sources.
Catholic Church--Portugal--History--16th century--Sources.
Portugal--Church history--Sources.
Portugal--Foreign relations--Catholic Church--Sources.
Princeton subject headings:
Catholic Church--Foreign relations--Portugal--History--16th century--Sources.
Catholic Church--Portugal--History--16th century--Sources.
Portugal--Church history--Sources.
Portugal--Foreign relations--Catholic Church--Sources.