Columbia subject headings:
Harvard subject headings:
Gerhardt, Paul, 1607-1676--Congresses.
Hymn writers--Germany--Congresses.
Princeton subject headings:
Gerhardt, Paul, 1607-1676--Criticism and interpretation--Congresses.
Hymns, German--History and criticism--Congresses.
Religion in literature--Congresses.
Spirituality in literature--Congresses.
Theology in literature--Congresses.