Não informado. (1950). Operational Research Quarterly. Operational Research Club.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Operational Research Quarterly. London: Operational Research Club, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Operational Research Quarterly. Operational Research Club, 1950.
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