Subjects: *PETROLEUM sales & prices; *ENERGY industries; *PETROLEUM industryCOLOMBIA; MEXICO; LATIN AmericaPETROLEO Brasileiro SA ; PETROLEOS Mexicanos ; PETROLEOS de Venezuela SA
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Subjects: *COMPETENCY tests (Education); *MATHEMATICAL ability testing; *EDUCATION policyCOLOMBIA; LATIN America; MEXICOPROGRAMME for International Student Assessment
Subjects: *INTERNATIONAL economic integration; *STOCK exchanges; *INTERNATIONAL cooperationCHILE; COLOMBIA; MEXICO