North American flora - New York Botanical Garden (New York Botanical Garden, 1922)

The North American sylva, or A description of the forest trees of the United States, Canada and Nova Scotia considered particularly with respect to their use in the arts, and their introduction into commerce : to which is added a description of the most useful of the European forest trees : illustrated by 156 coloured engravings - Michaux, François-André, 1770 -1855 (Printed by C. d'Hautel, 1819)

The North American sylva, or A description of the forest trees of the United States, Canada and Nova Scotia ... to which is added a description of the most useful of the European forest trees ... - Hillhouse, Augustus L. (Augustus Lucas), 1791 -1859 (Printed by C. D'Hautel, 1819)

North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies - Britton, Nathaniel Lord, 1859 -1934 (H. Holt and Co, 1908)

North American trees; being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies; with the assistance of John Adolph Shafer - Britton, Nathaniel Lord, 1859 -1934 (Holt, 1908)

North American trees (exclusive of Mexico and tropical United States) A handbook designed for field use - Preston, Richard Joseph, 1905 - (Iowa State University Press, 1961)

North American trees : guide to Charles F. Millspaugh Hall - Field Museum of Natural History. (1934)

North Atlantic biota and their history; a symposium held at the University of Iceland, Reykjavík, July 1962, under the auspices of the University of Iceland and the Museum of Natural History. Editors: Askell Löve and Doris Löve. Sponsored by the NATO Advanced Study Institutes Program - Áskell Löve, 1916 -1994 (Pergamon Press, 1963)

North Carolina forest resources and industries - Cruikshank, James W. (U.S. Dept. of Agriculture, 1944)

North Platte River area designated (noxious) weed treatment program : environmental assessment record - United States. Bureau of Land Management. (Wyoming Department of Agriculture, 1978)

Northeastern Area Forest Health Report (1993)

Northeastern Area Forest Health Report–1992 (1994)

The northern hardwood forest : its composition, growth, and management - Frothingham, E. H. (Earl Hazeltine), 1880 - (U.S. Dept. of Agriculture, 1915)

Notable flowers to brighten your garden, 1935 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bristol Nurseries, Inc, 1935)

Notes on forest trees suitable for planting in the United States - United States. Bureau of Forestry. ([Place of publication not identified], 1903)

Notes on trees on the grounds of McGill University - Dawson, J. W., (John William), 1820 -1899 (s.n, 1891)

Noteworthy records of Shrews from the Panhandle of Texas - Bradley, Robert D. (Museum of Texas Tech University, 2016)

Notizblatt des Königl. Botanischen Gartens und Museums zu Berlin - Engler, Adolf, 1844 -1930 (In Commission bei Wilhelm Engelmann, 1902)

Notizen aus dem Gebiete der Natur- und Heilkunde (Druck und Verlag des Landes-Industrie-Comptoirs, 1847)

Nouveau dictionnaire d'histoire naturelle, appliquée aux arts, à l'agriculture, à l'économie rurale et domestique, à la médecine, etc (Chez Deterville, 1818)

Nouveaux éléments d'histoire naturelle médicale : comprenant des notions générales sur la zoologie, la botanique et la minéralogie, l'histoire et les propriétés des animaux et des végétaux utiles ou nuisibles à l'homme, soit par eux-mêmes, soit par l - Cauvet, D. (Désiré), 1827 -1890 (J.B. Baillière, 1869)

Nouvelles archives du Muséum d'histoire naturelle - Muséum national d'histoire naturelle (France) (Masson et Cie, 1910)

Nova acta Regiae Societatis Scientiarum Upsaliensis - Kungl. Vetenskaps-societeten i Uppsala. (Almqvist & Wiksells, 1905)

Nova acta Regiae Societatis Scientiarum Upsaliensis - Kungl. Vetenskaps-societeten i Uppsala. (Almqvist & Wiksells, 1907)

November 1931 seed for nurserymen - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1931)

Novitates zoologicae : a journal of zoology in connection with the Tring Museum - British Museum (Natural History) (Zoological Museum, 1903)

Now! new low prices, 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (San Fernando Nursery Company, 1930)

Nucrop 1947 seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1947)

Nursery catalogue - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bloodgood Nurseries, 1912)

Nursery practice for trees and shrubs suitable for planting on the prairie-plains - Engstrom, H. E. (Harold Edwin), 1909 - (U.S. Dept. of Agriculture, 1941)

Nursery propagation of woody and herbaceous perennials for the Prairie Provinces - Canada. Agriculture Canada (Communications Branch, Agriculture Canada, 1982)

Nursery stock and commercial forest planting, 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Franklin Forestry Co, 1931)

Nursery stock and commercial forest planting, 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Franklin Forestry Co, 1932)

Nursery stock and greenhouse products : wholesale list, spring 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bobbink & Atkins, 1931)

[Nursery stock brokerage list] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1928)

Nursery stock catalog [and] planting guide : 37th year, 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Malmo & Co, 1930)

Nursery stock of distinction, complete landscape department : price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Westminster Nurseries, 1943)

Nursery stock of distinction, complete landscape department : price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Westminster Nurseries, 1948)

Nursery stock of distinction, complete landscape department : price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Westminster Nurseries, 1947)

Nursery stock of distinction, complete landscape department - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Westminster Nurseries, 1938)

Nursery stock of distinction, complete landscape department - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Westminster Nurseries, 1940)

Nursery stock of distinction, complete landscape department - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Westminster Nursery, 1937)

Nursery stock, spring-fall 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Julius Roehrs Co, 1932)

Nursery stock, trees, shrubs, plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Franklin Forestry Nursery, 1940)

Nursery stock, trees, shrubs, plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Franklin Forestry Co, 1939)

Nursery stock, trees, shrubs, plants, ornamental evergreens - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Franklin Forestry Co, 1933)

Nursery stock, trees, shrubs, plants, ornamental evergreens - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Franklin Forestry Co, 1935)

Nurserymen's seeds, 1927 crop : June 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1928)

Nurserymen's seeds, fresh 1927 crop : April 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1928)

Österreichs allgemeine baumzucht, : oder Abbildungen in- und ausländischer Bäume und Sträuche, deren Anpflanzung in Österreich möglich und nützlich ist - Schmidt, Franz, 1751 -1835 (Ignaz Albertischen Buchdruck, 1822)

Oak Park Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Oak Park Nurseries, 1948)

Oak Park Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Oak Park Nurseries, 1947)

Observations on the flowering plants, ferns and fern allies growing wild in Marquette County, Michigan, in 1916 and 1917, especially in the vicinity of the Huron Mountain Club - University of Michigan. Museum of Zoology. (Published by the University, 1918)

Occasional papers - Texas Tech University. Museum, (The Museum, 1999)

Occasional papers - Texas Tech University. Museum, (The Museum, 2003)

Occasional papers of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1869)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1984)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1989)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1993)

Occasional papers of the Museum of Zoology, University of Michigan - University of Michigan. Museum of Zoology. (University of Michigan, 1918)

Occasional papers of the Museum of Zoology, University of Michigan - University of Michigan. Museum of Zoology. (University of Michigan, 1921)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1877)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1878)

Oesterreichische botanische Zeitschrift (A. Skofitz)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1888)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1916)

Offer No. 29 : February 9th, 1929 price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1929)

Offer No. 31 : March 9th, 1929 price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1929)

Offer No. 32 : April 1st, 1929 price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1929)

Offer No. 34 : June 1st, 1929 price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1929)

Offer No. 50 : Nov. 7, 1929 price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Herbst Brothers, 1929)

Ohio Biological Survey notes - Ohio Biological Survey. (Ohio Biological Survey, 1998)

Ohio Biological Survey notes - Ohio Biological Survey. (Ohio Biological Survey, 2011)

Ohio Biological Survey notes - Ohio Biological Survey. (Ohio Biological Survey, 2017)

The Ohio journal of science - Ohio Academy of Science. (Ohio Academy of Science, 1909)

The Ohio journal of science - Ohio Academy of Science. (Ohio Academy of Science, 1912)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1900)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1903)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1904)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1905)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1906)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1908)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1909)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1910)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1913)

Old Colony Nurseries Incorporated [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Old Colony Nurseries, 1914)

Old Colony Nurseries Incorporated [catalog] : 1840-1915 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Old Colony Nurseries, 1915)

On the forestry conditions of northern Wisconsin - Roth, Filibert, 1858 -1925 (The State, 1898)

The Ontario natural science bulletin - Wellington Field Naturalists' Club. (Wellington Field Naturalists' Club, 1913)

The Ontario natural science bulletin - Wellington Field Naturalists' Club. (Wellington Field Naturalists' Club, 1912)

The Oölogist for the student of birds, their nests and eggs - Lattin, Frank H. (Frank H. Lattin, 1914)

Opuscula philolichenum (J. Lendemer, 2013)

Opuscula philolichenum (J. Lendemer, 2017)

Opuscula philolichenum (J. Lendemer, 2020)

Opuscula philolichenum (J. Lendemer, 2022)

Orchard & garden book, 1944 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (California Nursery Company, 1944)

Orchard & garden book, 1945 - Roeding, George Christian, 1868 -1928 (California Nursery Company, 1945)

Orchard & garden book, 1946 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (California Nursery Company, 1946)

Orchard and garden book, 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (California Nursery Company, 1936)

Orchard injury by the hickory tiger-moth - Isely, Dwight, 1887 -1974 (U.S. Dept. of Agriculture, 1918)

The orchids in the Ottawa District : floristics, phytogeography, population studies and historical review / Joyce M. Reddoch and Allan H. Reddoch - Ottawa Field-Naturalists' Club (The Ottawa Field-Naturalists' Club, 1997)