Over a trillion barrels of tar and pitch are located in Venezuela's Orinoco River region. Petroleos de Venezuela plans to extract and refine the tar into crude oil through one of two methods: emulsification or hydrocracking-distillation-hydrotreatment.
Publication Name: The Economist (UK)
Subject: Business, international
Stalin's greatest secret
The life of Russian leader Josef Stalin has been well-documented, but a secret file covering his pre-revolutionary career has been unearthed and forms the basis for the book, The Secret File of Joseph Stalin: A Hidden Life.
Publication Name: Times Higher Education Supplement
Publication Name: Scouting
Subject: Hobbies and crafts
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