What were the "7 sisters" of the oil industry and what role did they have in Venezuela
For much of the 20th century, a small group of American and European firms decided everything in the oil market: from how much was produced and where, to what price each barrel was sold for.
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Source: BBC Mundo
Durante buena parte del siglo XX, un pequeño grupo de firmas estadounidenses y europeas lo decidió todo en el mercado petrolero: desde cuánto se producía y dónde, hasta a qué precio se vendía cada barril.
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