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Principia botanica: or, A concise and easy introduction to the sexual botany of Linnaeus ... Arranged in a tabular form, under each class and order; and digested alphabetically under several generic distinctions. Together with three indexes ... Also a table of several vegetable drugs not in the indexes ... - Darwin, Robert Waring, 1724 -1816 (Printed and sold by M. Hage; [etc., etc.], 1810)

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The principles of agriculture; a text-book for schools and rural societies - Bailey, L. H. (Liberty Hyde), 1858 -1954 (The Macmillan company, 1918)

The principles of agriculture; a text-book for schools and rural societies - Bailey, L. H. (Liberty Hyde), 1858 -1954 (The Macmillan company, 1909)

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The principles of plant-teratology - Worsdell, Wilson Crosfield (The Ray Society, 1915)

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Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1943)

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Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1935)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1954)

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Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1981)

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