Columbia subject headings:
Harvard subject headings:
Catholic Church in Flanders--History--Sources.
Catholic Church--Belgium--Flanders--History--Sources.
Catholic Church--Foreign relations--Belgium--Flanders.
Catholic Church--Relations (diplomatic) with Flanders.
Flanders--Foreign relations--Catholic Church.
Flanders--History--Sources.
Princeton subject headings:
Catholic Church--Flanders--History.
Catholic Church--Foreign relations--Flanders.
Flanders--Foreign relations--Catholic Church.
Flanders--History--Sources.