Orchidophile; journal des amateurs d'orchideés - Godefroy-Lebeuf, A. (Alexandre), 1844 -1903 (1883)

Orchids - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Julius Roehrs Company, 1911)

Orchids; a description of the species and varieties grown at Glen Ridge, near Boston, with lists and descriptions of other desirable kinds : preface by chapters on the culture, propagation, collection, and hybridization of orchids; the construction and management of orchid houses; a glossary of botanical terms and significance of their names; the whole forming a complete manual of orchid culture - Rand, Edward Sprague, Jr., 1834 -1897 (Houghton, Mifflin and company, 1888)

Orchids: their culture and management - Watson, William, 1858 -1925 (L. U. Gill, 1903)

Orchids, their structure, history & culture - Castle, R. Lewis ("Journal of horticulture" Office, 1886)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1908)

Oregon flora newsletter - Oregon State University. Department of Botany; Plant Pathology. (Oregon Flora Project, Dept. of Botany & Plant Pathology, Oregon State University, 1999)

Florist's journal (How and Parsons, 1840)

Ornamental nursery stock - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Jewell Nursery Co, 1912)

Ornamental nursery stock - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Jewell Nursery Co, 1916)

An ornithological index, arranged according to the synopsis avium of Mr. Vigors / by T. B. L. Baker - Vigors, N. A.‏ ‎ (Nicholas Aylward),‏ ‎ 1785 -1840 (Printed by R. Taylor, 1835)

Der Ornithologische Beobachter - Ala, Schweizerische Gesellschaft für Vogelkunde und Vogelschutz. (Ala, Schweizerische Gesellschaft für Vogelkunde und Vogelschutz, 1910)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1904)

Ornithologisches Centralblatt (L.A. Kittler, 1879)

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

Osteologia avium : or a sketch of the osteology of birds - Eyton, T. C. (Thomas Campbell), 1809 -1880 (Salop, R. Hobson)

Osteology of birds - Shufeldt, Robert Wilson 1850 -1934 (University of the State of New York, 1909)

Outlines of general zoology - Baird, Spencer Fullerton, 1823 -1887 (Rudolph Garrigue, 1851)

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)

Oysters, and all about them : being a complete history of the titular subject, exhaustive on all points of necessary and curious information from the earliest writers to those of the present time, with numerous additions, facts, and notes - Philpots, John Richards. (J. Richardson, 1890)

Palæontology of New-York ... - Hall, James, 1811 -1898 (Printed by C. Van Benthuysen, 1847)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1864)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1870)

Papers and proceedings of the Royal Society of Van Diemen's Land - Royal Society of Tasmania. (Royal Society of Van Diemen's Land, 1855)

Papers relating to Canada and Newfoundland (S.E. Dawson, 1892)

The papilios of Great Britain : systematically arranged, accurately engraved, and painted from nature with the natural history of each species ... - Lewin, William, 1795 (Printed for J. Johnson, 1795)

The papilios of Great Britain, systematically arranged, accurately engraved, and painted from nature, with the natural history of each species, from a close application to the subject, and observations made in different countries of this kingdom; as well as from breeding numbers from the egg, or caterpillar, during the last thirty years - Lewin, William, 1795 (Printed for J. Johnson, 1795)

Les papillons dans la nature : 64 planches en couleurs et monographies - Robert, Paul-A. (Éditions Delachaux and Niestlé, s.a, 1934)

Les papillons, leur histoire, la manière de leur faire la chasse et de les conserver : ouvrage amusant et instructif, orné de figures représentant un choix des plus beaux papillons d'Europe ... - Balland, Eugène Amédée ([Chez] Lecerf, 1823)

Park and cemetery - Haight, R. J. (Rufus J.) (R.J. Haight, 1896)

Pater mundi, or, Doctrine of evolution : being in substance lectures delivered in various colleges and theological seminaries - Burr, E. F. (Enoch Fitch), 1818 -1907 (Noyes, Holmes, 1873)

Peter Henderson & Co. : Autumn bulb catalogue 1890 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1890)

Peter Henderson & Co.'s catalogue of everything for the garden : 1880 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1880)

Peter Henderson & Co.'s catalogue of everything for the garden : 1881 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1881)

Peter Henderson & Co.'s catalogue of everything for the garden : 1877 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1877)

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

Petri Artedi renovati pars I. et II. [III-V] : i.e. bibliotheca et philosophia ichthyologica - Linné, Carl von, 1707 -1778 (Impensis A.F. Röse, 1792)

Das Pflanzenleben der Schweiz - Christ, H. (Hermann), 1833 -1933 (F. Schulhess, 1882)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1903)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1931)

Pharmaceutical journal and transactions - Pharmaceutical Society of Great Britain. (J. & A. Churchill, 1879)

Pheasants : their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (Field press, 1922)

Pheasants: their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (Horace Cox, 1881)

Pheasants; their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (Field Press, 1922)

Pheasants; their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (H. Cox, 1904)

Pheasants : their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (H. Cox, 1897)

Pheasants; their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (H. Cox, 1911)