Não informado. (1927). Heating and ventilating engineer and journal of air conditionin. Technitrade Journals.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Heating and Ventilating Engineer and Journal of Air Conditionin. London: Technitrade Journals, 1927.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Heating and Ventilating Engineer and Journal of Air Conditionin. Technitrade Journals, 1927.
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