The orchid hybrids enumeration and classification of all hybrids of orchids published up to October 15, 1895 - Hansen, Geo. (George), 1863 -1908 (Dulau, 1895)

The Orchid review (Orchid Review ltd.], 1902)

The Orchid review (Orchid Review ltd.], 1904)

The Orchid review (Orchid Review ltd.], 1921)

The orchid-stud book : an enumeration of hybrid orchids of artificial origin ... : with an historical introduction ... and a chapter on hybridising and raising orchids from seed - Hurst, C. C. 1870 -1947 (F. Leslie, 1909)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1911)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1912)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1913)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1914)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1915)

Orchidaceae: illustrations and studies of the family Orchidaceae - Ames, Oakes, 1874 -1950 (Houghton, Mifflin, 1910)

Orchids for everyone - Curtis, Charles H. (J.M. Dent, 1910)

Orchids : illustrated and descriptive catalogue and price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lager & Hurrell, 1912)

Orchids : illustrated and descriptive catalogue and price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lager & Hurrell, 1924)

Orchids : illustrated and descriptive catalogue and price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lager & Hurrell, 1927)

Orchids : illustrated and descriptive catalogue and price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lager & Hurrell, 1923)

Orchids, stove, greenhouse and hardy plants, vegetable and flower seeds : for the trade only - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitcher & Manda, 1894)

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

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

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1910)

Organization lists of the agricultural colleges and experiment stations in the United States : with a list of agricultural experiment stations in foreign countries - United States. Office of Experiment Stations. (G.P.O, 1899)

Organized programs to utilize natural enemies of pests in Canada, Mexico, United States : papers presented at the joint symposium, national meeting of the Entomological Society of America, Nov. 30-Dec. 4, 1975, New Orleans, Louisiana - Entomological Society of America (Plant Protection and Quarantine Programs, Animal and Plant Health Inspection Service, U.S. Dept. of Agriculture, 1976)

Florist's journal (How and Parsons, 1840)

Florist's journal (How and Parsons, 1842)

Florist's journal (How and Parsons, 1844)

Ornamental shrubs and trees fruit trees shrub and tree seed - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Germain, 1934)

Ornis - International Ornithological Committee. (Carl Gerold's Sohn, 1886)

Ornithological gazetteer of Argentina - Paynter, Raymond A. Jr. (Obtainable from Bird Dept., Museum of Comparative Zoology, Harvard University, 1995)

Ornithologie, ou, Méthode contenant la division des oiseaux en ordres, sections, genres, especes & leurs variétés : a laquelle on a joint une description exacte de chaque espece, avec les citations des auteurs qui en ont traité, les noms quils leur ont donnés, ceux que leur ont donnés les différentes nations, & les noms vulgaires - Martinet, François Nicolas, 1731 -1800 (Ad Ripam Augustinorum, apud Cl. Joannem-Baptistam Bauche, bibliopolam, ad Insigne S. Genovesae, & S. Joannis in Deserto, 1760)

Ornithologische Monatsberichte (Verlag von R. Friedländer & Sohn, 1910)

Ornithologische Monatsberichte (Verlag von R. Friedländer & Sohn, 1917)

Ornitologia siciliana : o sia catalogo ragionato degli uccelli che si trovano in Sicilia - Benoit, Luigi, 1804 -1890 (Giuseppe Fiumara, 1840)

Orthoptera of northeastern America, with especial reference to the faunas of Indiana and Florida - Blatchley, W. S. (Willis Stanley), 1859 -1940 (The Nature Publishing Company, 1920)

Orthoptera of northeastern America : with especial reference to the faunas of Indiana and Florida - Blatchley, W. S. (Willis Stanley), 1859 -1940 (Nature Pub. Co., 1920, 1920)

Oscar y Amanda, ó, Los descendientes de La Abadía - Blanquel, Simón. (Simon Blanquel, 1854)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1892)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1896)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1897)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1900)

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

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1902)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1903)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1904)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1906)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1907)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1908)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1909)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1910)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1916)

Otto H. Roller, florist - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Otto H. Roller, 1932)

Our 1918 catalog of seeds, bulbs, roses, trees, birds, poultry and garden supplies - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Routledge Seed & Floral Co, 1918)

Our 1924 complete annual catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Routledge Seed & Floral Co, 1924)

Our 1925 complete annual catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Routledge Seed & Floral Co, 1925)

Our 1926 complete annual catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Routledge Seed & Floral Co, 1926)

Our 1927 complete annual catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Routledge Seed & Floral Co, 1927)

Our 1928 complete annual catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Routledge Seed & Floral Co, 1928)

Our complete annual catalog, 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Routledge Seed & Floral Co, 1929)

Our complete annual catalog of highest quality seeds, bulbs, plants, roses, birds, poultry and garden supplies - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Routledge Seed & Floral Co, 1931)

Our complete annual catalog of highest quality seeds, bulbs, plants, roses, birds, poultry and garden supplies - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Routledge Seed & Floral Co, 1930)

Our garden journal [an illustrated quarterly conducted and controlled by amateur flower gardeners] - Harde, Elinore, E., Mrs., (1920)

Our new guide to rose culture : 1891 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1891)

Our new guide to rose culture : 1905 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1906)

Our new guide to rose culture : autumn 1904 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1904)

Our new guide to rose culture : autumn 1907 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1907)

Our North land; being a full account of the Canadian Northwest and Hudson's Bay route, together with a narrative of the experiences of the Hudson's Bay Expedition of 1884, including a description of the climate, resources, and the characteristics of the native inhabitants between the 50th parallel and the Arctic Circle - Tuttle, Charles R. (Charles Richard), 1848 - (C.B. Robinson, 1885)

Our search for a wilderness; an account of two ornithological expeditions to Venezuela and to British Guiana - Beebe, William, 1877 -1962 (Constable, 1910)

Our search for a wilderness; an account of two ornithological expeditions to Venezuela and to British Guiana - Beebe, William, 1877 -1962 (H. Holt and company, 1910)

Our search for a wilderness : an account of two ornithological expeditions to Venezuela and to British Guiana - Beebe, William, 1877 -1962 (Holt, 1910)

Our selected list of perennials and dahlias : beautify your landscape with our help - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Daybreak Nurseries, Inc, 1935)

Our tour in Canada - Davies, C. E., 1921 (Davies Bros, 1921)

Ouresiphoitēs Helveticus, sive, Itinera per Helvetiae Alpinas regiones facta annis MDCCII, MDCCIII, MDCCIV, MDCCV, MDCCVI, MDCCVII, MDCCIX, MDCCX, MDCCXI : plurimis tabulis aeneis illustrata - Scheuchzer, Johann Jakob, 1672 -1733 (Typis ac sumptibus Petri Vander Aa, 1723)

Overview of 1998 pesticide sales in Alberta - Byrtus, Gary (Alberta Environment, Environmental Service, Environmental Sciences Division, 2000)

Overview of fish contaminant monitoring programs in jurisdictions and summary of Alberta studies : final report - Alberta. Alberta Environment. (Alberta Environment, 2007)

Pacific rural handbook; containing a series of brief and practical essays and notes on the culture of trees, vegetables and flowers, adapted to the Pacific coast. Also hints on home and farm improvements - Shinn, Charles Howard, 1852 -1924 (Dewey & co, 1879)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2007)

The Page-Philipps Seed Co.'s farm & garden guide. season of 1917. 65th year - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Page-Philipps Seed Co, 1917)

The Page-Philipps Seed Co.'s farm & garden guide. season of 1916. 64th year - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Page-Philipps Seed Co, 1916)

The Page-Philipps Seed Co.'s farm & garden guide. season of 1918. 66th year - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Page-Philipps Seed Co, 1918)

Palaeontographia Italica : Memorie di paleontologia - Canavari, Mario 1855 -1928 (Tip. T. Nistri, 1902)

Palaeontographia Italica : Memorie di paleontologia - Canavari, Mario 1855 -1928 (Tip. T. Nistri, 1906)

Palaeontographica (Theodor Fischer, 1862)

Palaeontographica (Theodor Fischer, 1864)

Palaeontographica Americana - Paleontological Research Institution (Ithaca, N.Y.) (Paleontological Research Institution, 1976)

Palaeontology - Palaeontological Association (Palaeontological Association, 1971)

Palaeontology - Palaeontological Association (Palaeontological Association, 1974)

Palaeontology - Palaeontological Association (Palaeontological Association, 1978)

Palaeontology - Palaeontological Association (Palaeontological Association, 1990)

Pamphlets - Canada. Department of Agriculture. Publications Branch. (Dominion of Canada, Dept. of Agriculture, Publications Branch, 1915)

Pamphlets on forestry. History (1900)