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

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

Principles of geology : being an attempt to explain the former changes of the earth's surface, by reference to causes now in operation - Deshayes, G. P. (Gérard Paul), 1795 -1875 (John Murray, 1833)

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Proceedings and Transactions of the Croydon Microscopical & Natural History Club - Croydon Microscopical; Natural History Club. (1881)

Proceedings and transactions of the Natural History Society of Glasgow - Natural History Society of Glasgow. (The Society, 1883)

Proceedings and transactions of the Natural History Society of Glasgow - Natural History Society of Glasgow. (The Society, 1886)

Proceedings and transactions of the Natural History Society of Glasgow - Natural History Society of Glasgow. (The Society, 1889)

Proceedings and transactions of the Royal Society of Canada. Délibérations et mémoires de la Société royale du Canada - Royal Society of Canada. (Société royale du Canada, 1915)

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Proceedings of the Bath Natural History and Antiquarian Field Club - Bath Natural History; Antiquarian Field Club. (1870)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1873)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1901)

Proceedings of the Cotteswold Naturalists' Field Club - Cotteswold Naturalists' Field Club. (1865)

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Proceedings of the Geological and Polytechnic Society of the West Riding of Yorkshire - Geological; Polytechnic Society of the West Riding of Yorkshire. ([Geological and Polytechnic Society of the West Riding of Yorkshire], 1871)

Proceedings of the Geological Society of London - Geological Society of America. (The Society, 1842)

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The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1915)

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Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1898)

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Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1905)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1907)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1908)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1910)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1912)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1913)

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Proceedings of the Natural history society of Dublin for the session ... - Natural History Society of Dublin. (Printed for the Society, 1856)

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Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1884)

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Proceedings of the Royal Society of Edinburgh - Royal Society of Edinburgh. (Royal Society of Edinburgh, 1903)

Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1862)

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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, 1899)

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

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Proceedings of the Yorkshire Geological Society - Yorkshire Geological Society. (Yorkshire Geological Society, 1906)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1853)

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Raboty Volzhskoĭ biologicheskoĭ stant͡sii = Arbeiten der Biologischen Wolga-Station - Volzhskai͡a biologicheskai͡a stant͡sii͡a (Stant͡sii͡a, 1926)

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Recherches sur les organes palléaux des Gastéropodes Prosobranches - Bernard, Félix, 1863 -1898 (G. Masson, 1890)

The Record of zoological literature (J. van Voorst, 1867)