Columbia subject headings:
Church charities--History--Congresses.
Deacons--Reformed Church--Congresses.
Reformed Church--Charities--History--Congresses.
Reformed Church--Doctrines--Congresses.
Service (Theology)--Congresses.
Harvard subject headings:
Calvinism--Congresses.
Church and state--Congresses
Reformation--Congresses
Reformed Church--History--Congresses.
Service (Theology)--Congresses.
Princeton subject headings: