Não informado. (1951). List of books accessioned and periodical articles indexed in the Columbus Memorial Library. Pan American Union.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. List of Books Accessioned and Periodical Articles Indexed in the Columbus Memorial Library. Washington: Pan American Union, 1951.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. List of Books Accessioned and Periodical Articles Indexed in the Columbus Memorial Library. Pan American Union, 1951.
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