Columbia subject headings:
Esso Standard Oil Company (Cuba)--History.
Petroleum industry and trade--Cuba--History.
Shell Oil Company--Cuba--History.
Texaco, Inc.--Cuba--History.
Harvard subject headings:
Esso Standard Oil Company (Cuba)--History.
Petroleum industry and trade--Cuba--History.
Shell Oil Company--History.
Texaco, inc.--History.
Princeton subject headings:
Petroleum industry and trade--Cuba--History.