Columbia subject headings:
Energy policy--Uruguay--History--20th century.
Petroleum industry and trade--Uruguay--History--20th century.
Power resources--Uruguay--History--20th century.
Harvard subject headings:
Energy policy--Uruguay--History--20th century.
Petroleum industry and trade--Uruguay--History--20th century.
Power resources--Uruguay--History--20th century.
Princeton subject headings:
Business enterprises, Foreign--Uruguay--History--20th century.
Energy industries--Uruguay--History--20th century.
Energy policy--Uruguay--History--20th century.
Natural resources--Government policy--Uruguay--History--20th century.
Trusts, Industrial--Uruguay--History--20th century.