Practical hints respecting moths and butterflies, with notices of their localities : forming a calendar of entomological operations throughout the year, in pursuit of Lepidoptera - Shield, Richard. (John Van Voorst, 1856)

Practical plant biochemistry - Onslow, Muriel Wheldale 1880 -1932 (University Press, 1923)

Practical plant biochemistry - Onslow, Muriel Wheldale 1880 -1932 (University Press, 1920)

Practical plant biochemistry - Onslow, Muriel Wheldale 1880 -1932 (University press, 1920)

Der praktische landschaftsgärtner. Eine anleitung zur anlegung oder verschönerung von gärten verschiedener grösse ... Mit anweisung zu einer zweckmässigen benützung des küchengartens, zu spargel- und artischokenpflanzung, champignons-zucht, gurken- and melonentreiberei u.s.w - Hertz, Wilhelm. (Hoffmann, 1840)

Prehistoric Europe : a geological sketch - Darwin, Charles, 1809 -1882 (Edward Stanford, 1881)

Prehistoric Europe, a geological sketch - Geikie, James, 1839 -1915 (E. Stanford, 1881)

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

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The principles of practical gardening - Johnson, George William, 1802 -1886 (R. Baldwin, 1845)

Problems of evolution - Headley, F. W. (Frederick Webb), 1856 -1919 (Duckworth, 1900)

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Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1950)

Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1953)

Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1965)

Proceedings - Cambridge Philosophical Society. Mathematical and physical sciences - Cambridge Philosophical Society. (Cambridge Philosophical Society [etc.], 1910)

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Proceedings of the Bournemouth Natural Science Society - Bournemouth Natural Science Society (1914)

Proceedings of the Bournemouth Natural Science Society - Bournemouth Natural Science Society (1922)

Proceedings of the Bournemouth Natural Science Society - Bournemouth Natural Science Society (1925)

Proceedings of the Bournemouth Natural Science Society - Bournemouth Natural Science Society (1926)

Proceedings of the Bournemouth Natural Science Society - Bournemouth Natural Science Society (1935)

Proceedings of the Bournemouth Natural Science Society - Bournemouth Natural Science Society (1950)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1885)

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

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Proceedings of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (South London Entomological and Natural history Society, 1901)

Proceedings of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (South London Entomological and Natural history Society, 1910)

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Prodrome de la flore Belge - De Wildeman, Emile 1866 -1947 (Alfred Castaigne, 1898)

Prodrome de la flore belge - Wildeman, E. de (Emile), 1866 -1947 (A. Castaigne, 1898)

Prodromus florae Hispanicae :seu Synopsis methodica omnium plantarum in Hispania, sponte nascentium vel frequentius cultarum quae innotuerunt - Willkomm, Moritz, 1821 -1895 (E. Schweizerbart, 1870)