Columbia subject headings:
Energy policy--Russia--History--20th century.
Energy policy--Soviet Union--History--20th century.
Fuel trade--Russia--History--20th century.
Fuel trade--Soviet Union--History--20th century.
Harvard subject headings:
Energy policy--Russia--History--20th century.
Energy policy--Soviet Union--History--20th century.
Fuel trade--Russia--History--20th century.
Fuel trade--Soviet Union--History--20th century.
Princeton subject headings:
Energy policy--Russia--History--20th century.
Energy policy--Soviet Union--History--20th century.
Fuel trade--Russia--History--20th century.
Fuel trade--Soviet Union--History--20th century.