Não informado. (1979). Energy technology. National Swedish Board for Technical Development.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Energy Technology. Stockholm: National Swedish Board for Technical Development, 1979.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Energy Technology. National Swedish Board for Technical Development, 1979.
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