Não informado. (1983). Space Communications and Broadcasting. European Space Agency.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Space Communications and Broadcasting. Amsterdam: European Space Agency, 1983.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Space Communications and Broadcasting. European Space Agency, 1983.
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