Não informado. The Sight-saving Review. National Society for the Prevention of Blindness.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Sight-saving Review. New York: National Society for the Prevention of Blindness.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Sight-saving Review. National Society for the Prevention of Blindness.
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