Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1955)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1956)

Opuscules entomologiques - Mulsant, Martial Étienne, 1797 -1880 (L. Maison, 1859)

Ornithological biography, or an account of the habits of the birds of the United States of America ; accompanied by descriptions of the objects represented in the work entitled The Birds of America, and interspersed with delineations of American scenery and manners - Audubon, John James, 1785 -1851 (Adam Black, 1831)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1914)

Ornithology - Jardine, William, 1800 -1874 (W.H. Lizars, 1853)

Our insect friends and foes - Duncan, F. Martin (Francis Martin), 1873 -1961 (Methuen, 1911)

Our living world; an artistic edition of the Rev. J. G. Wood's Natural history of animate creation - Wood, J. G. (John George), 1827 -1889 (S. Hess, 1885)

Our summer migrants. An account of the migratory birds which pass the summer in the British islands - Harting, James Edmund, 1841 -1928 (Bickers and son, 1875)

Our summer migrants. An account of the migratory birds which pass the summer in the British Islands - Harting, James Edmund, 1841 -1928 (Bickers and Son, 1875)

Outlines of entomology, published in connection with the author's annual reports upon injurious insects Part first. Including the order of coleoptera - LeBaron, William. (State Journal Steam Print, 1874)

Palaozoologie : Entwurf einer systematischen Darstellung der Fauna der Vorwelt - Giebel, C. (Christoph), 1820 -1881 (Nulandt'sche buchandlung (L. Garcke), 1846)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1948)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1971)

Papéis avulsos do Departamento de Zoologia - São Paulo Departamento de Zoologia (A Secretaria, 1945)

Papéis avulsos do Departamento de Zoologia - São Paulo Departamento de Zoologia (A Secretaria, 1948)

Papéis avulsos do Departamento de Zoologia - São Paulo Departamento de Zoologia (A Secretaria, 1950)

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

Petri Artedi ... Ichthyologia sive opera omnia de piscibus, scilicet: Bibliotheca ichthyologica. Philosophia ichthyologica. Genera piscium. Synonymia specierum. Descriptiones specierum. Omnia in hoc genere perfectiora, quam antea ulla - Linné, Carl von, 1707 -1778 (apud Conradum Wishoff, 1738)

Petri Artedi ... Ichthyologia: sive, opera omnia de piscibus, scilicet: Bibliotheca ichthyologica. Philosophia ichthyologica. Genera piscium. Synonymia specierum. Descriptiones specierum. Omnia in hoc genere perfectiora, quam antea ulla - Artedi, Peter, 1705 -1735 (Apud Conradum Wishoff, 1738)

Petri Artedi renovati pars I. et II. [III-V] : i.e. bibliotheca et philosophia ichthyologica - Walbaum, Johann Julius, 1724 -1799 (impensis A. F. Röse, 1788)

Petri Artedi renovati pars I. et II. [III-V] : i.e. bibliotheca et philosophia ichthyologica - Linné, Carl von, 1707 -1778 (Impensis A.F. Röse, 1793)

Phegea - Vlaamse Vereniging voor Entomologie. (Vlaamse Vereniging voor Entomologie, 2006)

Philadelphia Medical and Physical Journal (1806)

Philippi Conradi Fabricii ... Commentatio historico-physico-medica de animalibus quadrupedibus, avibus, amphibiis, piscibus et insectis Wetteraviae indigenis - Fabricius, Philipp Conrad, 1714 -1774 (Schnorrius, 1749)

The Philosophical magazine : or Annals of chemistry, mathematics, astronomy, natural history and general science (Richard Taylor and Co, 1828)

The Philosophical magazine : or Annals of chemistry, mathematics, astronomy, natural history and general science (Richard Taylor and Co, 1829)

The Philosophical transactions of the Royal society of London, from their commencement in 1665, in the year 1800 - Royal Society (Great Britain) (Printed by and for C. and R. Baldwin, 1809)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1724)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1740)

Physica sacra - Scheuchzer, Johann Jakob, 1672 -1733 (Christian Ulrich Wagner], 1731)

Physisch-therapeutische Erläuterung aller jener Arzneymittel, : welche in der neuen verbesserten österreichischen Provincial-Pharmakopöe enthalten sind - Neuhauser, Franz, 1820 (Bey Franz Joseph Rôtzel, Buchhändler in der Singerstrasse, 1796)

Phytoneuron (Guy L. Nesom, 2013)

Piscium, serpentum, insectorum, aliorumque nonnullorum animalum nec non plantarum quarundam imagines :quas Marcus Catesby in posteriore parte splendidi illius operis quo Carolinae Floridae et Bahamensium Insularum traditit historiam naturalem eivsque appendice descripsit - Eisenberger, Nicolaus Friedrich, 1707 -1771 (Georgii Wolfgangi Knorrii, 1777)

Der Plauische Grund bei Dresden : mit Hinsicht auf Naturgeschichte und schöne Gartenkunst - Darnstedt, Johann Adolph, 1769 -1844 (In der Frauenholzischen Kunsthandlung, 1799)

Pliny's Natural history. In thirty-seven books - Pliny, the Elder, 23 or 24 -79 (Printed for the Club by G. Barclay, 1847)

The popular encyclopedia; being a general dictionary of arts, sciences, literature, biography, history, and political economy, reprinted from the American edition of the "Conversations lexicon" ... with dissertations on the rise and progress of literature (Blackie, 1900)

Popular natural history : a description of animal life, from the lowest forms up to man - Kingsley, J. S. (John Sterling), 1854 -1929 (Estes & Lauriat, 1890)

Practical pheasant rearing: with an appendix on grouse driving - Price, Richard John Lloyd. (H. Cox, 1888)

Die preussische expedition nach Ost-Asien : nach amtlichen quellen V. 1 Zoologischer theil - Martens, Eduard von, 1831 -1904 (R. v. Decker, 1876)

Primæ Lineæ cognitionis insectorum - Schluga, Johann Baptist. (Impensis Joannis Pauli Kraus, 1767)

Primae lineae systematis naturæ : nexui naturali omnium evolutionique progressivae per nixus reascendentes superstructi - Gori͡aninov, Pavel Fedorovich, 1796 -1865 (Typis Karoli Krajanis, 1834)

The primaeval world of Switzerland - Heer, Oswald, 1809 -1883 (Longmans, Green, 1876)

Primitiae florae Salisburgensis, cum dissertatione praevia de discrimine plantarum ab animalibus - Schrank, Franz von Paula, 1747 -1835 (1792)

Principles of animal ecology - Allee, W. C. (Warder Clyde), 1885 -1955 (Saunders Co, 1949)

Proceedings and transactions of the British Entomological and Natural History Society - British Entomological; Natural History Society. (British Entomological and Natural History Society, 1974)

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

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1852)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1854)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1860)

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)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1938)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1942)

Proceedings of the Entomological Society of Ontario - Entomological Society of Ontario. (Entomological Society of Ontario, 1963)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1998)

Proceedings of the Linnean Society of London - Linnean Society of London. (Published for the Linnean Society of London by Academic Press [etc.], 1912)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1982)

Proceedings of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (South London Entomological and Natural history Society, 1924)

Proceedings of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (South London Entomological and Natural history Society, 1926)

Proceedings of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (South London Entomological and Natural history Society, 1928)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1942)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1956)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1957)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1960)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1964)

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

Prodromus in systema historicum testaceorum - Spalowsky, Joachim Johann Nepomuk, 1752 -1797 (Gedruckt bey Ignaz Alberti's Wittwe, 1795)

Progress report - United States. Entomology Research Division. (1968)

Promtuarium rerum naturalium et artificialium Vratislaviense : praecipue quas collegit D.Io. Christianus Kundmann, medicus vratislaviensis - Kundmann, Johann Christian, 1684 -1751 (Apud Michaelem Hubertum, 1726)