Phylogeny of the Pelecypoda : the Aviculidae and their allies - Jackson, Robert Tracy, 1861 -1948 (Boston Society of Natural History, 1890)

Die pilze in morphologischer, physiologischer, biologischer und systematischer beziehung - Zopf, W. (Wilhelm), 1846 -1909 (E. Trewendt, 1890)

Planterester i Norske torvmyrer : et bidrag til den norske vegetations historie efter den sidste istid - Holmboe, Jens 1880 -1943 (J. Dybwad, A.W. Brøggers boktr, 1903)

Pleiocene fossils of South Carolina : containing descriptions and figures of the Polyparia, Echinodermata and Mollusca - Holmes, F. S. (Francis Simmons), 1815 -1882 (Russell & Jones, 1857)

Pleiocene fossils of South Carolina : containing descriptions and figures of the Polyparia, Echinodermata and Mollusca - Holmes, F. S. (Francis Simmons), 1815 -1882 (Russell & Jones, 1860)

The Pliocene deposits of Britain - Reid, Clement, 1853 -1916 (Printed for HMSO by Eyre and Spottiswoode, 1890)

A pocket list of British marine Mollusca - Bailey, George. (Tindall & co., printers, 1887)

"Pola" expedition: Mollusks. [5 works on mollusks resulting from investigations on voyages of the S.M. Schiff "Pola", 1890-1898] (K.K. Hof- und Staatsdruckerei, 1896)

Popular British conchology. A familiar history of the molluscs inhabiting the British Isles - Sowerby, George Brettingham, 1788 -1854 (Lovell Reeve, 1854)

Popular conchology, or, The shell cabinet arranged according to the modern system : with a detailed account of the animals, and a complete descriptive list of the families and genera of recent and fossil shells - Catlow, Agnes, 1807? -1889 (Longman, Brown, Green, and Longmans, 1854)

The Popular educator: a complete encyclopaedia of elementary, advanced and technical education (Cassell, 1888)

A popular history of the Mollusca; comprising a familiar account of their classification, instincts and habits, and of the growth and distinguishing characters of their shells - Roberts, Mary, 1788 -1864 (Reeve and Benham, 1851)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1876)

Post-Pleiocene fossils of South-Carolina - Holmes, F. S. (Francis Simmons), 1815 -1882 (Russell & Jones, 1860)

A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures - Quekett, John, 1815 -1861 (H. Bailliere, 1848)

A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures - Quekett, John, 1815 -1861 (H. Bailliere; [etc., etc.], 1852)

Principles of geology - Lyell, Charles, Sir, 1797 -1875 (John Murray, 1837)

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)

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 (J. Murray, 1830)

Principles of geology : or the modern changes of the earth and its inhabitants considered as illustrative of geology - Lyell, Charles, Sir, 1797 -1875 (John Murray, 1867)

Principles of stratigraphy - Grabau, Amadeus W. (Amadeus William), 1870 -1946 (A.G. Seiler and company, 1913)

Prize essay on the natural and economical history of the fishes marine, fluviatile, and lacustrine, of the river district of the Firth of Forth - Parnell, Richard, 1810 -1882 (A. and C. Black, 1838)

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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, 1871)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1872)

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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, 1880)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1882)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1887)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1917)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1845)

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Proceedings of the Royal Physical Society of Edinburgh - Royal Physical Society of Edinburgh. (The Society, 1888)

Proceedings of the Royal Physical Society of Edinburgh - Royal Physical Society of Edinburgh. (The Society, 1890)

Proceedings of the Royal Physical Society of Edinburgh - Royal Physical Society of Edinburgh. (The Society, 1909)

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Proceedings of the Royal Society of Victoria. New series - Royal Society of Victoria (Melbourne, Vic.) (Stillwell and Co, 1994)

Proceedings of the Royal Society of Victoria. New series - Royal Society of Victoria (Melbourne, Vic.) (Stillwell and Co, 2000)

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Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1883)

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Procès-verbaux - Société Linnéenne de Bordeaux. (1905)

Procès-verbaux - Société Linnéenne de Bordeaux. (1915)

Procès-verbaux - Société Linnéenne de Bordeaux. (1933)

Procès-verbaux - Société Linnéenne de Bordeaux. (1947)

Prodrome de paléontologie stratigraphique universelle des animaux mollusques & rayonnés, faisant suite au Cours élémentaire de paléontologie et de géologie stratigraphiques - Orbigny, Alcide Dessalines d', 1802 -1857 (V. Masson, 1849)

Prodromo della storia naturale generale e comparata d'Italia ... - Marmocchi, Francesco Constantino, 1805 -1858 (Società editrice fiorentina, 1844)

Prodromus faunae mediterraneae, sive Descriptio animalium maris Mediterranei incolarum, quam comparata silva rerum quatenus innotuit, adiectis locis et nominibus vulgaribus eorumque auctoribus - Carus, Julius Victor, 1823 -1903 (E. Schweizerbart, 1889)

Prodromus faunae molluscorum testaceorum maria europaea inhabitantium - Kobelt, Wilhelm, 1840 -1916 (Bauer & Raspe, 1888)

Publications in biological oceanography - National Museum of Natural Sciences (Canada) (The Museum, 1974)

Quadro elementar da historia natural dos animaes - Cuvier, Georges, baron, 1769 -1832 (impresso por H. Bryer, 1815)

Quarterly journal of conchology (D. Bogue, 1874)

Quarterly journal of conchology (D. Bogue, 1877)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1860)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1907)