Não informado. (1964). Conference board record. National Industrial Conference Board.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Conference Board Record. New York: National Industrial Conference Board, 1964.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Conference Board Record. National Industrial Conference Board, 1964.
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