Papers from the Tortugas Laboratory of the Carnegie Institution of Washington - Carnegie Institution of Washington. Department of Marine Biology. (Carnegie Institution of Washington, 1915)

Part I. The living flora of West Virginia - Millspaugh, Charles Frederick, 1854 -1923 (Wheeling news litho. co, 1913)

Pelagos, saggi sulla vita e sui prodotti del mare - Giglioli, Enrico Hillyer, 1845 -1909 (Tipografia del R. Istituto de' Sordo-Muti, 1884)

Die Pflanzenwelt - Warburg, Otto, 1859 -1938 (Bibliographisches Institut, 1913)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1865)

Philosophie des organischen : Gifford-vorlesungen gehalten an der Universität Aberdeen in den Jahren 1907-1908 - Driesch, Hans, 1867 -1941 (W. Engelmann, 1909)

The philosophy of biology - Johnstone, James, 1870 -1932 (at the University Press, 1914)

The philosophy of biology - Johnstone, James, 1870 -1932 (University Press, 1914)

Phoronis - Stazione zoologica di Napoli. (R. Friedländer & Sohn, 1909)

A phylogenetic classification of animals (for the use of students) - Herdman, W. A. Sir, (William Abbott), 1858 -1924 (Macmillan and Co, 1885)

The physiology of the Invertebrata - Griffiths, A. B. (Arthur Bower), 1859 - (D. Appleton and Company, 1892)

The physiology of the invertebrata - Griffiths, A. B. (Arthur Bower), 1859 - (L. Reeve, 1892)

The physiology of twinning - Newman, Horatio Hackett, 1875 -1957 (The University of Chicago Press, 1923)

Physis - Sociedad Argentina de Ciencias Naturales. (Asociación Argentina de Ciencias Naturales [etc.], 1921)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1979)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1998)

The Phytologist: a botanical journal - Irvine, Alexander, 1793 -1873 (William Pamplin, 1857)

Die Pilze (Fungi) von Tirol, Vorarlberg und Liechtenstein - Magnus, P. (Paul), 1844 -1914 (Verlag der Wagner'schen Universitts-Buchh, 1905)

A plain and easy account of British fungi : with descriptions of the esculent and poisonous species, details of the principles of scientific classification, and a tabular arrangement of orders and genera - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (Robert Hardwicke, 1862)

A plain and easy account of British fungi; with descriptions of the esculent and poisonous species. . .and a tabular arrangement of orders and genera - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (R. Hardwicke, 1862)

A plain and easy account of British Fungi : with especial reference to the esculent and economic species - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (W.H. Allen & co, 1884)

A plain and easy account of the British fungi : with descriptions of the esculent and poisonous species, details of the principles of scientific classification, and a tabular arrangement of orders and genera - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (1866)

A plain and easy account of the British fungi, with descriptions of the esculent and poisonous species, details of the principles of scientific classification, and a tabular arrangement of orders and genera - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (Hardwicke, 1871)

A plain easy account of British fungi : with descriptions of the esculent and poisonous species - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (1862)

Planktonkunde - Steuer, Adolf, 1871 - (B.G. Teubner, 1910)

Plant disease Fungi - Stevens, Frank Lincoln, 1871 -1934 (The Macmillan company, 1925)

Plant life of Alabama : an account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state - Mohr, Charles (Charles Theodore), 1824 -1901 (Brown Printing Co, 1901)

Plant life of Alabama, an account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state - Mohr, Charles (Charles Theodore), 1824 -1901 (Brown printing co, 1901)

Plant life of Alabama. An account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state. Prepared in cooperationwith the Geological Survey of Alabama - Mohr, Charles (Charles Theodore), 1824 -1901 (Govt. Print. Off, 1901)

The Plant world - Plant World Association. (Plant World Association [etc.], 1898)

The Plant world - Plant World Association. (Plant World Association [etc.], 1901)

The Plant world - Plant World Association. (Plant World Association [etc.], 1908)

Plants of Iowa; a preliminary list of the native and introduced plants of the state, not under cultivation - Greene, Wesley. (Bishard brothers, printers, 1907)

Plants of Monroe County, New York, and adjacent territory : second supplementary list - Baxter, Milton S. (Rochester Academy of Science, 1917)

Ponds and rock pools : with hints on collecting for and the management of the micro-aquarium - Scherren, Henry, 1842 -1911 (Religious Tract Society, 1894)

Ponds and rock pools, with hints on collecting for and the management of the micro-aquarium - Scherren, Henry, 1842 -1911 (Religious Tract Society, 1900)

Popular Science Review (1869)

Popular Science Review (1875)

Popular Science Review (1877)

Population studies of marine animals in Bolinas Lagoon - Chan, Gordon L. (College of Marin, 1967)

Pozsonyi Orvos-Termeszettudomanyi Egyesulet Kozlemenyei - Verein für natur- und heilkunde, Pressburg (1894)

A preliminary report on the Hymeniales of Connecticut - White, Edward Albert, 1872 -1943 (Hartford Press, The Case, Lockwood & Brainard C, 1905)

A preliminary report on the Hymeniales of Connecticut - White, Edward Albert, 1872 -1943 (Hartford Press, The Case, Lockwood & Brainard Company, 1905)

President's address and the sectional addresses. 1831 - British Association for the Advancement of Science. (1922)

Principles of comparative physiology - Carpenter, William Benjamin, 1813 -1885 (John Churchill, 1854)

Principles of economic zoölogy - Daugherty, L. S. (Lewis Sylvester) 1857 -1919 (W. B. Saunders Company, 1917)

Principles of economic zoo̤logy - Daugherty, L. S. (Lewis Sylvester) 1857 -1919 (W.B. Saunders, 1915)

Principles of economic zoölogy - Daugherty, L. S. (Lewis Sylvester) 1857 -1919 (W. B. Saunders company, 1912)

Principles of economic zoölogy - Daugherty, L. S. (Lewis Sylvester) 1857 -1919 (W. B. Saunders, 1917)

Principles of economic zoölogy - Daugherty, L. S. (Lewis Sylvester) 1857 -1919 (W.B. Saunders, 1912)

Principles of embryology - Waddington, C. H. (Conrad Hal), 1905 -1975 (Macmillan, 1956)

Principles of physiology, general and comparative - Carpenter, William Benjamin, 1813 -1885 (John Churchill, 1851)

Principles of zoölogy : a guide for beginners - Schiedt, Richard Francis Conrad, 1859 -1951 (Examiner Printing House, 1892)

Prinzipien der generellen Morphologie der Organismen. Wörtlicher Abdruck eines Teiles der 1866 erschienen Generellen Morphologie (allgemeine Grundzüge der organischen Formen-Wissenschaft, mechanisch begründet durch die von Charles Darwin reformierte Deszendenz-Theorie) - Haeckel, Ernst, 1834 -1919 (G. Reimer, 1906)

Prirodoslovna istraživanja - Jugoslavenska akademija znanosti i umjetnosti. (1916)

Problematica Silurica : Systême Silurien du centre de la Bohême - Barrande, Joachim, 1799 -1883 (en commission chez Raimund Gerhard, ancienne Maison Wolfgang Gerhard, Leipsig, 1908)

Les problèmes de la sexualité - Caullery, Maurice, 1868 -1958 (E. Flammarion, 1919)

Les problèmes de la vie : essai d'une interprétation scientifique des phénomènes vitaux - Giglio-Tos, Ermanno, 1865 -1926 (Chez l'auteur, 1903)

Les problèmes de la vie. Essai d'une interprétation scientifique des phénomènes vitaux - Giglio-Tos, Ermanno, 1865 -1926 (L'auteur, 1900)

Proceedings - Dorset Natural History; Archaeological Society.

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1899)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1901)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1902)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1903)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1906)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1890)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1913)

Proceedings and transactions of the Natural History Society of Glasgow - Natural History Society of Glasgow. (The Society, 1892)

Proceedings and transactions of the Nova Scotian Institute of Natural Science - Nova Scotian Institute of Natural Science. (Nova Scotian Institute of Natural Science, 1863)

Proceedings and transactions of the Nova Scotian Institute of Natural Science - Nova Scotian Institute of Natural Science. (Nova Scotian Institute of Natural Science, 1879)

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, 1916)

Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1947)

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

Proceedings - Dorset Natural History and Archaeological Society - Dorset Natural History; Archaeological Society. (1877)

Proceedings of the American Academy of Arts and Sciences - American Academy of Arts; Sciences. (Metcalf and Co, 1857)

Proceedings of the American Academy of Arts and Sciences - American Academy of Arts; Sciences. (Metcalf and Co, 1875)

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

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1922)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1888)

Proceedings of the Bournemouth Natural Science Society - Bournemouth Natural Science Society (1910)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1877)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1879)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1888)

Proceedings of the Elliott Society of Natural History of Charleston, South-Carolina - Elliott Society of Natural History (Russell & Jones, 1853)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1900)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1979)

Proceedings of the Literary and Philosophical Society of Liverpool - Literary; Philosophical Society of Liverpool. (1856)

Proceedings of the Natural history society of Dublin for the session ... - Natural History Society of Dublin. (Printed for the Society, 1878)

Proceedings of the Natural History Society of Glasgow - Natural History Society of Glasgow. (Natural History Society of Glasgow, 1858)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 1982)

Proceedings of the Rochester Academy of Science - Rochester Academy of Science. (The Academy, 1891)

Proceedings of the Rochester Academy of Science - Rochester Academy of Science. (The Academy, 1910)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1898)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1909)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1911)

Proceedings of the Royal Society of Edinburgh - Royal Society of Edinburgh. (Royal Society of Edinburgh, 1905)

Proceedings of the Royal Society of London. Series B, Containing papers of a Biological character - Royal Society (Great Britain) (Printed for the Royal Society and sold by Harrison & Sons, 1913)

Proceedings of the Royal Society of London. Series B, Containing papers of a Biological character - Royal Society (Great Britain) (Printed for the Royal Society and sold by Harrison & Sons, 1917)

Proceedings of the Royal Society of London. Series B, Containing papers of a Biological character - Royal Society (Great Britain) (Printed for the Royal Society and sold by Harrison & Sons, 1921)

Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1901)

Proceedings of the semi-centennial anniversary of the Torrey botanical club, October 18, 19 and 20, 1917 - Torrey Botanical Club. (1918)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1906)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1862)

Prodrome de la flore Belge - De Wildeman, Emile 1866 -1947 (Alfred Castaigne, 1899)

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)