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Untersuchungen der Augen von 10060 Schulkindern, nebst Vorschlägen zur Verbesserung der den Augen nachtheiligen Schuleinrichtungen : eine ätiologische Studie / von Hermann Cohn. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)