Columbia subject headings:
Political participation--Mexico.
Political participation--Venezuela.
Working class--Political activity--Mexico.
Working class--Political activity--Venezuela.
Harvard subject headings:
Political participation--Mexico
Political participation--Venezuela
Working class--Mexico--Political activity.
Working class--Political activity--Mexico.
Working class--Political activity--Venezuela.
Working class--Venezuela--Political activity.
Princeton subject headings:
Political participation--Mexico.
Political participation--Venezuela.
Working class--Mexico--Political activity.
Working class--Venezuela--Political activity.