Hay fever : its causes, treatment, and effective prevention : experimental researches / by Chas. Harrison Blackley.

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Hay fever : its causes, treatment, and effective prevention : experimental researches / by Chas. Harrison Blackley. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.