Waste products and undeveloped substances : a synopsis of progress made in their economic utilisation during the last quarter of a century at home and abroad / by P.L. Simmonds.

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Waste products and undeveloped substances : a synopsis of progress made in their economic utilisation during the last quarter of a century at home and abroad / by P.L. Simmonds. 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.