Não informado. (1961). Electronics and communications abstracts. Multi-Science Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Electronics and Communications Abstracts. Brentwood, Inglaterra: Multi-Science Publishing, 1961.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Electronics and Communications Abstracts. Multi-Science Publishing, 1961.
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