Columbia subject headings:
Councils and synods--Cleve (Duchy)--History--Sources.
Reformed Church--Germany--History--Sources.
Harvard subject headings:
Cleve (Duchy)--Church history--Sources.
Councils and synods, Provincial--Cleve (Duchy)--History--17th century--Sources.
Councils and synods--Germany--Cleve (Duchy)--History--Sources.
Reformed Church--Cleve (Duchy)--History--17th century--Sources.
Reformed Church--Germany--History--Sources.
Princeton subject headings: