Columbia subject headings:
Harvard subject headings:
Archives--Germany--Exhibitions.
Celebrities--Germany--Correspondence--Exhibitions.
Germany--History--1789-1900--Sources--Exhibitions.
Germany--History--20th century--Sources--Exhibitions.
Historisches Archiv Krupp.
History, Modern--19th century--Sources--Exhibitions.
History, Modern--20th century--Sources--Exhibitions.
Industrialists--Germany--Correspondence--Exhibitions.
Krupp family--Archives--Exhibitions.
Princeton subject headings:
Archives--Germany--Essen--Exhibitions.
Authors, German--Correspondence--Catalogs.
Catalogs.
German letters--Catalogs.
Historisches Archiv Krupp--Catalogs.
Manuscripts--Germany--Catalogs.