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, 1946)

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, 1954)

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, 1939)

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)

Opuscula entomologica - Thomson, C. G. (Carl Gustav), 1824 -1899 (1883)

Opuscula zoologica - Zoologische Staatssammlung München. (Zoologische Staatssammlung, 1960)

Opuscula zoologica - Zoologische Staatssammlung München. (Zoologische Staatssammlung, 1961)

Opuscules entomologiques - Mulsant, Martial Étienne, 1797 -1880 (L. Maison, 1870)

The origin of species - Darwin, Charles, 1809 -1882 (P.F. Collier, 1909)

The origin of species by means of natural selection, or, the preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (John Murray, 1872)

The origin of species : by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (D. Appleton & Co, 1889)

The origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (John Murray, 1880)

The origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (J. Murray, 1888)

The origin of species by means of natural selection; or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (J. Murray, 1886)

The origin of species by means of natural selection : or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (Merrill and Baker, 1900)

The origin of species by means of natural selection, or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (A.L. Burt, 1899)

The origin of species by means of natural selection, or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (A.L. Burt, 1894)

The origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life - Darwin, Charles, 1809 -1882 (J. Murray, 1902)

The origin of species by means of natural selection; or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (D. Appleton and Company, 1909)

The origin of species by means of natural selection, or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (D. Appleton, 1899)

The origin of species by means of natural selection, or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (D. Appleton and Company, 1917)

The origin of species by means of natural selection; or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (D. Appleton and Company, 1889)

The origin of species by means of natural selection; or, the preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (D. Appleton and company, 1915)

The origin of species by means of natural selection : or The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (Hurst, 1872)

Origin of species by means of natural selection, or, The preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (P. F. Collier, 1902)

Origin of species by means of natural selection, or the preservation of favored races in the struggle for life - Darwin, Charles, 1809 -1882 (P. F. Collier, 1905)

Origin of species - Darwin, Charles, 1809 -1882 (H.M. Caldwell Co, 1900)

The origin of the species by means of natural selection - Darwin, Charles, 1809 -1882 (J. Murray, 1910)

Ornis - International Ornithological Committee. (Carl Gerold's Sohn, 1901)

Osservazioni naturali intorno alle cavallette nocive della Campagna Romana / [da Luigi Metaxa e Sebastiano Rolle] - Rolle, Sebastiano, (Vincenzo Poggioli, 1825)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1901)

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

Outdoor studies. Poems - Higginson, Thomas Wentworth, 1823 -1911 (Houghton, Mifflin and company, 1900)

Outlines of the natural history of Great Britain and Ireland, containing a systematic arrangement and concise description of all the animals, vegetables and fossiles which have hitherto been discovered in these kingdoms - Berkenhout, John, 1730 -1791 (Printed for P. Elmsly (Successor to Mr. Vaillant), 1769)

Outlines of zoology - Thomson, J. Arthur (John Arthur), 1861 -1933 (H. Frowde and Hodder & Stoughton, 1921)

Outlines of zoology - Thomson, J. Arthur (John Arthur), 1861 -1933 (Humphrey Milford, Oxford University Press, 1929)

P. Boddaert, med. doct. urbis Ulissingæ exconsiliarii ... Elenchus animalium, volumen I : sistens quadrupedia huc usque nota, eorumque varietates : ad ductum naturae, quantum fieri potuit disposita - Boddaert, Pieter, 1730 -1795 (Apud C.R. Hake, 1784)

P.A. Latreille scientiarum et artium instituti Gallici ... Genera crustaceorum et insectorum : secundum ordinem naturalem in familias disposita, iconibus exemplisque plurimis explicata - Latreille, P. A. (Pierre André), 1762 -1833 (Apud Amand Knig, Bibliopolam, 1807)

P.A. Latreille scientiarum et artium instituti Gallici ... Genera crustaceorum et insectorum : secundum ordinem naturalem in familias disposita, iconibus exemplisque plurimis explicata - Latreille, P. A. (Pierre André), 1762 -1833 (Apud Amand Knig, Bibliopolam, 1809)

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, 1935)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1941)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1960)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1962)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1963)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1965)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1974)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1976)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1982)

Pandora et flora Rybyensis - Linné, Carl von, 1707 -1778 (1785)

Papers on Diptera - Melander, A. L. (Axel Leonard), 1878 -1962 (Smithsonian Institution, 1903)

Personality of insects - Dixon, Royal, 1885 -1962 (Clark, 1924)

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

Petit Buffon illustré. Histoire naturelle ... extraits des grands ouvrages de Buffon, Lacépède et Cuvier. IV, Insectes - Cuvier, Georges, baron, 1769 -1832 (Didier, 1861)

Petite faune entomologique du Canada : précédée d'un traité élémentaire d'entomologie - Provancher, L. (Léon), 1820 -1892 (C. Darveau, 1883)

Petites nouvelles entomologiques (E. Deyrolle, 1869)

Die Pflanzenstoffe in chemischer, physiologischer, pharmakologischer und toxikologischer Hinsicht : für Aerzte, Apotheker, Chemiker und Pharmakologen - Husemann, August, 1833 -1877 (Springer, 1882)

Phegea - Vlaamse Vereniging voor Entomologie. (Vlaamse Vereniging voor Entomologie, 1981)

Phegea - Vlaamse Vereniging voor Entomologie. (Vlaamse Vereniging voor Entomologie, 1982)

Philadelphia Medical and Physical Journal (1804)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1921)

The Philosophical magazine : comprehending the various branches of science, the liberal and fine arts, geology, agriculture, manufactures and commerce (Richard Taylor and Co, 1806)

The Philosophical magazine : comprehending the various branches of science, the liberal and fine arts, geology, agriculture, manufactures and commerce (Richard Taylor and Co, 1812)

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)

Philosophie entomologique : ouvrage qui renferme les généralités nécessaires pour s'initier dans l'étude des insectes ... - Saint-Amans, Jean-Florimond Boudon de, 1748 -1831 (R. Noubel, 1798)

Philosophie Entomologique, ouvrage qui renferme les généralités nécessaires pour s'initier dans l'étude des Insectes et des aperçus sur les rapports naturels de ces petits animaux avec les autres êtres organisés ; suivi de l'exposition des méthodes de Geoffroy et de celle de Linné combinée avec le système de Fabricius ; pour servir d'introduction à la connoissan ce des Insectes, en procurant le moyen de les classer et de les rapporter à leurs genres, dont on donne les caractères essentiels et la synonymie - Noubel, Raymond (Aken) (de l'imprimerie de R.d Noubel, 1799)

Philosophie zoologique. vol. 1 - Lamarck, Jean-Baptiste-Pierre-Antoine de Monet de 1744 -1829 (Duminil-Lesueur, 1830)

Philosophie zoologique; ou, Exposition des considérations relatives à l'histoire naturelle des animaux. Nouv. éd., rev. et précédée d'une introd. biographique par Charles Martins - Lamarck, Jean-Baptiste-Pierre-Antoine de Monet de 1744 -1829 (F. Savy, 1873)

The philosophy of zoology, or, A general view of the structure, functions, and classification of animals - Fleming, John, 1785 -1857 (Hurst, Robinson & Co, 1822)

The philosophy of zoology; or, A general view of the structure, functions, and classification of animals - Fleming, John, 1785 -1857 (A. Constable, 1822)

Phylogenetic relationships and classification of the major lineages of Apoidea (Hymenoptera) : with emphasis on the crabronid wasps / by Gabriel A. R. Melo - Melo, Gabriel A. R. (Natural History Museum, The University of Kansas, 1999)

Physis - Sociedad Argentina de Ciencias Naturales. (Asociación Argentina de Ciencias Naturales [etc.], 1918)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1954)

The Phytologist: a popular botanical miscellany - Newman, Edward, 1801 -1876 (John van Voorst, 1850)

The pictorial museum of animated nature ... - Knight, Charles, 1791 -1873 (C. Knight, 1844)

The pictorial museum of animated nature - Knight, Charles, 1791 -1873 (C. Cox, 1844)

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

The poet Gray as a naturalist : with selections from his notes on the Systema naturae of Linnaeus, and facsimiles of some of his drawings - Merrymount Press. (Charles E. Goodspeed, 1903)

Poisonous insects - Riley, Charles V. (Charles Valentine), 1843 -1895 (William Wood & Company, 1887)

Polskie pismo entomologiczne = Polish journal of entomology = Bulletin entomologique de Pologne - Polski Zwiazek Entomologiczny (Panstwowe Wydawn. Naukowe, 1925)

Die Pompiliden-gattung Pepsis - Lucas, Robert, 1864 - ([C. Fromholz], 1895)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1872)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1911)

A popular zoology - Jenks, J. W. P. 1819 -1894 (A.S. Barnes & Company, 1887)

The Practical entomologist : a monthly bulletin - Entomological Society of Philadelphia (Entomological Society of Philadelphia, 1867)

Précis des caractères gérériques des insectes, disposés dans un ordre naturel - Latreille, P. A. (Pierre André), 1762 -1833 (F. Bourdeaux, 1796)

Précis des caractères génériques des insectes, disposés dans un ordre naturel - Latreille, P. A. (Pierre André), 1762 -1833 (Prèvôt; [etc., etc, 1796)