Nomenclator botanicus. Nominum ad finem anni 1858 publici juris factorum, classes, ordines, tribus, familias, divisiones, genera, subgenera vel sectiones designatium enumeratio alphabetica. Adjectis auctoribus, temporibus, locis systematicis, apud varios, notis literariis atque etymologicis et synonymis - Pfeiffer, Louis (Ludwig Georg Karl), 1805 -1877 (Sumptibus T. Fischeri, 1873)

Nomenclator "Florae Danicae;" sive, Index systematicus et alphabeticus operis quod "Icones florae Danicae" inscribitur, cum enumeratione tabularum ordinem temporum habente, adiectis notis criticis - Lange, Johan, 1818 -1898 (Lehmann & Stage, 1887)

Norfolk natterjack - Norfolk; Norwich Naturalists' Society. (Norfolk and Norwich Naturalists Society, 1990)

North American flora - New York Botanical Garden (New York Botanical Garden, 1907)

North American flora - New York Botanical Garden (New York Botanical Garden, 1914)

North American Flora （vol.10 Part1-5） - Willtam Alphonso Murrill (THE NEW YORK BOTANTCAL GARDEN, 1914)

North American species of Hygrophorus - Hesler, L. R. 1888 -1977 (University of Tennessee Press, 1963)

North Fork by Two timber sale project environmental assessment - Montana. Dept. of Natural Resources; Conservation. (Montana Dept. of Natural Resources and Conservation, Stillwater Unit, 2008)

Northeastern forest pest reporter - United States. Forest Service. (U. S. Dept. of Agriculture. Forest Service, Region Seven, 1956)

Notizblatt des Königl. Botanischen Gartens und Museums zu Berlin - Engler, Adolf, 1844 -1930 (In Commission bei Wilhelm Engelmann, 1899)

Nouvel atlas de poche des champignons comestibles et vénéneux - Dumée, Paul, 1849 -1930 (Lon Lhome, 1912)

Nouvelle flore française, descriptions succinctes et rangées par tableaux dichotomiques des plantes qui croissent spontanément en France et de celles qu'on y cultive en grand ... Ouvrage suivi d'une table générale des especes et de leurs synonymes - Gillet, C.-C. (Claude-Casimir), 1806 -1896 (Garnier freres, 1883)

Nova acta Regiae Societatis Scientiarum Upsaliensis - Kungl. Vetenskaps-societeten i Uppsala. (Almqvist & Wiksells, 1914)

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

Nya botaniska notiser ([A. Bonniers Förlag], 1852)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1911)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1913)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1963)

Occurrence of armillaria spp. in forests of the northern Rocky Mountains - Intermountain Research Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1987)

Oceanus - Woods Hole Oceanographic Institution. (Woods Hole Oceanographic Institution, 1976)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1860)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1870)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1883)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1885)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1893)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1896)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1900)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1901)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1902)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1904)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1906)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1909)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1913)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1916)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1873)

Ohio mycological bulletin - Ohio State University. (Ohio State University, 1903)

Ornithologie Nordost-Afrika's : der Nilquellen- und Küsten Gebiete des Rothen Meeres und des nördlichen Somal-Landes - Heuglin, Theodor von, 1824 -1876 (T. Fischer, 1873)

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

Outlines of British fungology; containing characters of above a thousand species of Fungi, and a complete list of all that have been described as natives of the British Isles - Berkeley, M. J. (Miles Joseph), 1803 -1889 (L. Reeve, 1860)

Outlines of British fungology. Supplement - Smith, Worthington George, 1835 -1917 (L. Reeve, 1891)

Pacific yew draft environmental impact statement - United States. Bureau of Land Management. (Portland, Ore, 1993)

Pacific yew final environmental impact statement - United States. Bureau of Land Management. (Portland, Oregon, 1993)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1897)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1904)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1914)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1896)

Pamphlets on forest protection (1900)

Pamphlets on forestry in California (1900)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1975)

I parassiti vegetali delle piante coltivate od utili - Ferraris, Teodoro. (Sineo & Bo, 1913)

Patologia vegetale. Fanerogame parassite, mixomiceti, bacterii, ifomiceti od eumiceti (funghi) - Voglino, Pietro. (Unione tipografico-editrice [Gia ditta Pomba e c], 1905)

Permanent sample plot (psp) field procedures manual - Alberta. Alberta Sustainable Resource Development. (Alberta Sustainable Resource Development, Public Lands and Forests Division, Forest Management Branch, 2005)

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

Pesticides publications list - United States. Federal Extension Service. (1965)

Petit atlas des champignons - Delachaux & Niestlé (Firm) (Delachaux & Niestlé S. A, 1900)

Pflanzen-teratologie systematisch geordnet - Penzig, O. (Ottone), 1856 -1929 (A. Ciminago, 1894)

Pflanzenmikrochemie : ein Hilfsbuch beim mikrochemischen Studium pflanzlicher Objekte - Tunmann, Otto, 1867 -1919 (Gebrüder Borntraeger, 1913)

Die Pflanzenwelt - Warburg, Otto, 1859 -1938 (Bibliographisches Institut, 1913)

Physiology of fungi - Cochrane, Vincent W. (Wiley, 1958)