Columbia subject headings:
Otto Maier Verlag.
Publishers and publishing--Germany--Ravensburg--History.
Harvard subject headings:
Otto Maier Verlag.
Publishers and publishing--Germany (West)--Ravensburg--History.
Publishers and publishing--Germany--Ravensburg--History.
Princeton subject headings:
Otto Maier Verlag.
Publishers and publishing--Germany (West)--Ravensburg--History.