Parasitology (Cambridge University Press, 1918)

Parasitology (Cambridge University Press, 1921)

Pesticides documentation bulletin - National Agricultural Library (U.S.) (National Agricultural Library, U.S. Dept. of Agriculture, #c 1965-1969, 1965)

Petrefactenkunde Deutschlands / von Fr. Aug. Quenstedt - Quenstedt, Fr. Aug. von (Friedrich August), 1809 -1889 (L.F. Fues, 1881)

A plain and easy account of the land and fresh-water mollusks of Great Britain : containing descriptions, figures, and a familiar account of the habits of each species - Tate, Ralph 1840 -1901 (R. Hardwicke, 1866)

A plain and easy account of the land and freshwater mollusks of Great Britain - Vincent Brooks, Day & Son, (R. Hardwicke, 1866)

The playtime naturalist - Taylor, J. E. (John Ellor), 1837 -1895 (Chatto & Windus, 1889)

A pocket guide to the British non-marine Mollusca, including fossil forms which occur in the post-pliocene deposits, excepting the forest bed series - Swanton, Ernest W. (C. Mosley, 1906)

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Précis analytique de l'histoire naturelle des mollusques terrestres et fluviatiles qui vivent dan le Bassin Sous-Pyrénéen - Noulet, J.-B. (Jean-Baptiste), 1802 -1890 (J.-B. Paya, 1834)

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

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Proceedings and transactions of the British Entomological and Natural History Society - British Entomological; Natural History Society. (British Entomological and Natural History Society, 1987)

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Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1894)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1897)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1900)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1910)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1919)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1913)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1841)

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Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1876)

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Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1957)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1896)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1897)

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

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1899)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1901)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1902)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1903)

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, 1908)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1909)

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, 1911)

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

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, 1914)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1915)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1917)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1918)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1919)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1920)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1921)