Columbia subject headings:
Publishers and publishing--Germany--Berlin--History--Sources--Bibliography--Catalogs.
Walter de Gruyter & Co.--Archives--Catalogs.
Harvard subject headings:
Catalogs
Publishers and publishing--Germany--Berlin--History--Sources--Bibliography--Catalogs.
Publishers and publishing--Germany--Berlin--Records and correspondence--Catalogs.
Walter de Gruyter & Co.--Archives.
Princeton subject headings:
Catalogs.
Publishers and publishing--Germany--Berlin--History--Sources--Bibliography--Catalogs.
Walter de Gruyter & Co.--Archives--Catalogs.