Não informado. (1950). British National Bibliography. British Library, Bibliographic Services Division.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. British National Bibliography. London: British Library, Bibliographic Services Division, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. British National Bibliography. British Library, Bibliographic Services Division, 1950.
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