Columbia subject headings:
Undset, Sigrid, 1882-1949.
Harvard subject headings:
Publishers and publishing--Germany.
Suhrkamp Verlag.
Unseld, Siegfried.
Princeton subject headings:
Authors and publishers--Germany--History--20th century.
Literature publishing--Germany--History--20th century.
Publishers and publishing--Germany--History--20th century.
Suhrkamp Verlag.
Unseld, Siegfried.