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Amateurs study aircraft design. Professionals study oil production.
Oil shale in Estonia - Wikipedia, the free encyclopedia 1938 Estonia produced 181,000 tons of shale oil. German firms were the largest producers. 1980 Estonia produced 31 million tons of shale oil. Appears to me 1930s Germany missed a great opportunity to solve their oil shortage. Offer...- davebender
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- estonia germany million oil tons
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