Columbia subject headings:
Folk songs, German--Germany--Schleswig-Holstein--History and criticism.
Folk songs, German--Germany--Schleswig-Holstein.
Songs, German--Germany--Schleswig-Holstein--History and criticism.
Songs, German--Germany--Schleswig-Holstein.
Harvard subject headings:
Folk songs, German--Germany--Schleswig-Holstein--History and criticism.
Folk songs, German--Germany--Schleswig-Holstein.
Songs, German--Germany--Schleswig-Holstein--History and criticism.
Songs, German--Germany--Schleswig-Holstein.
Princeton subject headings: