Não informado. (1961). Effluent and water treatment journal. Thunderbird Enterprises.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Effluent and Water Treatment Journal. London: Thunderbird Enterprises, 1961.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Effluent and Water Treatment Journal. Thunderbird Enterprises, 1961.
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