Não informado. (1955). British union-catalogue of periodicals. Butterworths.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. British Union-catalogue of Periodicals. London: Butterworths, 1955.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. British Union-catalogue of Periodicals. Butterworths, 1955.
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