Não informado. (1958). Journal of Environmental Engineering. Society of Environmental Engineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Environmental Engineering. Los Angeles, Calif: Society of Environmental Engineers, 1958.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Environmental Engineering. Society of Environmental Engineers, 1958.
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