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Hemming, D. F. (1978). The relative costs of producing syncrude from oil shales of various grades under varying conditions. ERG Report 22; Energy Research Group, The Open University, Milton Keynes.
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Hemming, D. F. (1978). The relative costs of producing syncrude from oil shales of various grades under varying conditions. ERG Report 22; Energy Research Group, The Open University, Milton Keynes.