Não informado. (1971). Advanced Technology Libraries. Knowledge Industry Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Advanced Technology Libraries. White Plains, NY: Knowledge Industry Publications, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Advanced Technology Libraries. Knowledge Industry Publications, 1971.
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