Columbia subject headings:
Reformation--Sources.
Reformed Church--Catechisms.
Reformed Church--Creeds--History and criticism.
Reformed Church--Creeds.
Reformed Church--Doctrines--History--Sources.
Reformed Church--Doctrines.
Reformed Church--History--Sources.
Harvard subject headings:
Reformation--Sources
Reformed Church--Creeds
Reformed Church--Creeds--History and criticism.
Reformed Church--Doctrines--History--Sources.
Reformed Church--Germany--History--Sources.
Reformed Church--History--Sources.
Princeton subject headings: