Columbia subject headings:
Councils and synods--Germany--History--Sources.
Evangelischer Kirchenkreis Aachen--History--Sources.
Germany--Church history--Sources.
Harvard subject headings:
Aachen (Germany)--Church history--19th century.
Bergmann, Reinhard.
Councils and synods--Germany--History--19th century--Sources.
Korth, Hermann.
Protestant churches--Germany--Aachen--History.
Princeton subject headings: