Breag, G. (1979). Producer gas: Its potential and application in developing countries. tropical product institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBreag, G. Producer Gas: Its Potential and Application in Developing Countries. London: tropical product institute, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBreag, G. Producer Gas: Its Potential and Application in Developing Countries. tropical product institute, 1979.
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