Columbia subject headings:
Peru--Commerce--United States.
Peru--Commercial policy--History--19th century.
United States--Commerce--Peru.
Harvard subject headings:
Peru--Commercial policy--History--19th century.
Peru--Economic conditions.
Peru--Foreign economic relations--United States.
Peru--Politics and government
United States--Foreign economic relations--Peru.
Princeton subject headings:
Peru--Commerce--United States.
Peru--Commercial policy--History--19th century.
United States--Commerce--Peru.