Columbia subject headings:
Harvard subject headings:
Electrochemicals industry--Germany--History.
Rathenau, Emil, 1838-1915.
Rathenau, Walther, 1867-1922.
Princeton subject headings:
Allgemeine Elektricitäts-Gesellschaft (Germany)
Electric industries--Germany--History.
Electrochemicals industry--Germany--History.
Industrialists--Germany--Correspondence.
Rathenau, Emil, 1838-1915--Correspondence.
Rathenau, Walther, 1867-1922--Correspondence.