Abstract of an address on 'plant breeding in the United States Department of Agriculture' / by Erwin F. Smith.

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Abstract of an address on 'plant breeding in the United States Department of Agriculture' / by Erwin F. Smith. In copyright. Source: Wellcome Collection.

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This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.