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  1. Hermann Ludwig Ferdinand von Helmholtz, by John Gray M'Kendrick.
    By: McKendrick, John Gray,
    Publication info: New York :Longmans, Green & Co.,1899.
    Contributed by: University of California Libraries (archive.org)
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  2. The principles of physiology, by John Gray McKendrick ...
    By: McKendrick, John Gray,
    Publication info: New York,H. Holt and Company; [etc., etc.,c1912]
    Contributed by: University of California Libraries (archive.org)
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