Columbia subject headings:
Mysticism--Germany--Schleswig-Holstein.
Mysticism--History--Middle Ages, 600-1500.
Visions.
Harvard subject headings:
Mysticism--Early works to 1800
Mysticism--Germany--Schleswig-Holstein.
Mysticism--History--Middle Ages, 600-1500
Visions.
Princeton subject headings:
Mysticism--Germany (West)--Schleswig-Holstein.
Mysticism--History--Middle Ages, 600-1500.
Visions.