Norges pattedyr - Collett, Robert, 1842 -1913 (H. Aschehoug & Co. (W. Nygaard), 1911)

Normentafeln zur Entwicklungsgeschichte der Wirbelthiere ... - Keibel, Franz, 1861 -1929 (G. Fischer, 1905)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1891)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1904)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1909)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1918)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1926)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1931)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1947)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1959)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1968)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1969)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1975)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1981)

Northern Territory Naturalist - Northern Territory Field Naturalists' Club (, Northern Territory Field Naturalists' Club, 1982)

Northern Territory Naturalist - Northern Territory Field Naturalists' Club (, Northern Territory Field Naturalists' Club, 1990)

Northern Territory Naturalist - Northern Territory Field Naturalists' Club (, Northern Territory Field Naturalists' Club, 1992)

Northern Territory Naturalist - Northern Territory Field Naturalists' Club (, Northern Territory Field Naturalists' Club, 2003)

Nota lepidopterologica - Societas Europaea Lepidopterologica (2014)

Notes from the Leyden Museum - Rijksmuseum van Natuurlijke Historie te Leiden. (E.J. Brill, 1887)

Notes from the Leyden Museum - Rijksmuseum van Natuurlijke Historie te Leiden. (E.J. Brill, 1892)

Notes from the Leyden Museum - Rijksmuseum van Natuurlijke Historie te Leiden. (E.J. Brill, 1907)

Notes from the Leyden Museum - Rijksmuseum van Natuurlijke Historie te Leiden. (E.J. Brill, 1906)

Notes from the Leyden Museum - Rijksmuseum van Natuurlijke Historie te Leiden. (E.J. Brill, 1879)

Notes from the Royal Zoological Museum of the Netherlands at Leyden - Schlegel, H. (Hermann), 1804 -1884 (E.J. Brill, 1879)

Notes on Bolivian mammals 5 Taxonomy and distribution of Bolomys (Muridae, Rodentia) - Anderson, Sydney, 1927 -2018 (American Museum of Natural History, 1989)

Notes on Bolivian mammals 3 A revised diagnosis of Andalgalomys (Rodentia, Muridae) and the description of a new subspecies - Anderson, Sydney, 1927 -2018 (American Museum of Natural History, 1987)

Notes on Bolivian mammals 4 The genus Ctenomys (Rodentia, Ctenomyidae) in the eastern lowlands - Anderson, Sydney, 1927 -2018 (American Museum of Natural History, 1987)

Notes on Bolivian mammals 7 A new species of Abrocoma (Rodentia) and relationships of the Abrocomidae - Anderson, Sydney, 1927 -2018 (American Museum of Natural History, 1990)

Notes on Peromyscus (Muridae) of Mexico and Central America - Musser, Guy G. (American Museum of Natural History, 1969)

Nova Guinea : résultats de l'expédition scientifique néerlandaise à la Nouvelle-Guinée ... - Beaufort, L. F. de (Lieven Ferdinand), 1879 -1968 (E.J. Brill, 1922)

Novitates zoologicae : a journal of zoology in connection with the Tring Museum - British Museum (Natural History) (Zoological Museum, 1895)

Novitates zoologicae : a journal of zoology in connection with the Tring Museum - British Museum (Natural History) (Zoological Museum, 1896)

Novitates zoologicae : a journal of zoology in connection with the Tring Museum - British Museum (Natural History) (Zoological Museum, 1898)

Novitates zoologicae : a journal of zoology in connection with the Tring Museum - British Museum (Natural History) (Zoological Museum, 1912)

Novitates zoologicae : a journal of zoology in connection with the Tring Museum - British Museum (Natural History) (Zoological Museum, 1920)

Novitates zoologicae : a journal of zoology in connection with the Tring Museum - British Museum (Natural History) (Zoological Museum, 1938)

Nuovi annali delle scienze naturali (1838)

Nuovi annali delle scienze naturali (1840)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1897)

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

Obras completas y correspondencia científica - Ameghino, Florentino, 1853 -1911 (Taller de Impresiones Oficiales, 1918)

Observations on bats of Córdoba and La Pampa provinces, Argentina - Tiranti Paz, Sergio I. (Museum of Texas Tech University, 1998)

Observations on the biology of rodents in Uruguay - Royal Ontario Museum. (Royal Ontario Museum], 1969)

Occasional papers - Boston Society of Natural History. (1904)

Occasional papers - Texas Tech University. Museum, (The Museum, 1972)

Occasional papers - Texas Tech University. Museum, (The Museum, 1974)

Occasional papers - Texas Tech University. Museum, (The Museum, 1979)

Occasional papers - Texas Tech University. Museum, (The Museum, 1983)

Occasional papers - Texas Tech University. Museum, (The Museum, 1985)

Occasional papers - Texas Tech University. Museum, (The Museum, 1986)

Occasional papers - Texas Tech University. Museum, (The Museum, 1987)

Occasional papers - Texas Tech University. Museum, (The Museum, 1988)

Occasional papers - Texas Tech University. Museum, (The Museum, 1989)

Occasional papers - Texas Tech University. Museum, (The Museum, 1990)

Occasional papers - Texas Tech University. Museum, (The Museum, 1991)

Occasional papers - Texas Tech University. Museum, (The Museum, 2001)

Occasional papers - Texas Tech University. Museum, (The Museum, 2002)

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