Columbia subject headings:
Trading companies--Switzerland--History.
Volkart AG--History.
Harvard subject headings:
International trade--History--19th century.
International trade--History--20th century.
International trade--Social aspects--History.
Trading companies--Switzerland--History.
Volkart AG--History.
Princeton subject headings:
International trade--History--19th century.
International trade--History--20th century.
International trade--Social aspects--History.
Trading companies--Switzerland--History.
Volkart AG--History.