Columbia subject headings:
Gerhardt, Paul, 1607-1676--Congresses.
Hymns, German--History and criticism--Congresses.
Protestant churches--Germany--Hymns--Congresses.
Harvard subject headings:
Gerhardt, Paul, 1607-1676--Congresses.
Hymns, German--History and criticism--Congresses.
Protestant churches--Germany--Hymns--Congresses.
Princeton subject headings:
Gerhardt, Paul, 1607-1676--Congresses.
Hymns, German--History and criticism--Congresses.
Protestant churches--Germany--Hymns--Congresses.