Columbia subject headings:
Harvard subject headings:
Petroleum industry and trade--Government ownership--Mexico--Public opinion.
Public opinion--Great Britain
Public opinion--Great Britain--History--20th century
Public opinion--Mexico
Public opinion--Mexico--History--20th century.
Public opinion--United States
Public opinion--United States--History--20th century
Princeton subject headings:
Foreign news.
Petroleum industry and trade--Government ownership--Mexico.
Petroleum industry and trade--Press coverage.