Columbia subject headings:
Chile saltpeter--History.
Chile--Economic conditions.
Chile--Foreign relations--Great Britain.
Great Britain--Foreign relations--Chile.
Saltpeter industry--Chile--History.
Harvard subject headings:
Chile saltpeter industry--Chile--History.
Chile--Foreign economic relations--Great Britain.
Corporación de Ventas de Salitre y Yodo de Chile--History.
Great Britain--Foreign economic relations--Chile.
Investments, British--Chile--History.
Princeton subject headings:
Chile saltpeter industry--Chile--History.
Chile--Foreign economic relations--Great Britain.
Corporación de Ventas de Salitre y Yodo de Chile--History.
Great Britain--Foreign economic relations--Chile.
Investments, British--Chile--History.