Columbia subject headings:
Chemical industry--Germany--History.
Interessengemeinschaft Farbenindustrie Aktiengesellschaft--History.
Harvard subject headings:
Chemical industry--Germany--History--20th century.
Interessengemeinschaft Farbenindustrie Aktiengesellschaft--History.
Princeton subject headings:
Chemical industry--Germany--History.
Interessengemeinschaft Farbenindustrie Aktiengesellschaft--History.