Não informado. (1972). Electronics and communications abstracts journal. Cambridge Scientific Abstracts.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Electronics and Communications Abstracts Journal. Bethesda, Md: Cambridge Scientific Abstracts, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Electronics and Communications Abstracts Journal. Cambridge Scientific Abstracts, 1972.
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