Não informado. New Technology. Ministry of Technology, Central Office of Information.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. New Technology. London: Ministry of Technology, Central Office of Information.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. New Technology. Ministry of Technology, Central Office of Information.
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