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  1. The horse : its history and uses.
    By: Crawfurd, John,
    Publication info: London :s.n.,1869
    Contributed by: National Library of Scotland (archive.org)
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  2. On the theory of the origin of the species by natural selection in the struggle for life / by John Crawfurd.
    By: Crawfurd, John,
    Publication info: London :Spottiswoode,1868.
    Contributed by: National Library of Scotland (archive.org)
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