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Natur Cymru : a review of wildlife in Wales - Natur Cymru, (Natur Cymru, 2010)

Natural history of New York - Hall, James, 1811 -1898 (D. Appleton & co. and Wiley & Putnam, 1843)

Natural history of New York (D. Appleton, 1842)

Natural history of the ground squirrels of California - Grinnell, Joseph, 1877 -1939 (California State Printing Office, 1918)

Natural infection of new hosts by hemlock dwarf mistletoe - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (Rocky Mountain Forest and Range Experiment Station, U.S. Dept. of Agriculture, 1994)

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Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet - Engler, Adolf, 1844 -1930 (W. Engelmann, 1887)

Naturwissenschaftliche Rundschau : wöchentliche Berichte über die Fortschritte auf dem Gesammtgebiete der Naturwissenschaften (Druck und verlag von Friedrich Vieweg und Sohn, 1900)

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Neue forstliche Blätter - Bühler, Anton, 1848 -1920 (Georg Schnürlen, 1902)

The New England farmer (Thomas W. Shepard, 1822)

The New phytologist - Tansley, A. G., Sir, (Arthur George), 1871 -1955 (Academic Press, 1909)

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Nomenclator botanicus hortensis : oder, alphabetische und synonymische aufzählung der in den gärten Europa's cultivirten gewächse, nebst angabe ihres autors, ihres vaterlandes, ihrer dauer und cultur - Heynhold, Gustav, 1800 -approximately 1860 (Arnoldischen Buchhandlung, 1840)

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North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1895)

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)

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The North American sylva, or, A description of the forest trees of the United States, Canada, and Nova Scotia, not described in the work of F. Andrew Michaux and containing all the forest trees discovered in the Rocky Mountains, the territory of Oregon, down to the shores of the Pacific and into the confines of California, as well as in various parts of the United States : illustrated by 122 fine plates - Nuttall, Thomas, 1786 -1859 (Smith & Wistar, 1849)

The North American sylva, or, A description of the forest trees of the United States, Canada, and Nova Scotia, not described in the work of F. Andrew Michaux and containing all the forest trees discovered in the Rocky Mountains, the territory of Oregon, down to the shores of the Pacific, and into the confines of California, as well as in various parts of the United States ; illustrated by 121 colored plates - Nuttall, Thomas, 1786 -1859 (R. Baldwin, 1853)

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)

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An outline of plant geography (The Macmillan company, 1926)

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Oxford gardens, based upon Daubeny's Popular guide to the physick garden of Oxford: with notes on the gardens of the colleges and on the University park - Gunther, R. T. (Robert Theodore), 1869 -1940 (Parker & son; [etc., etc.], 1912)

Oxford gardens. Based upon Daubeny's Popular guide to the physick garden of Oxford : with notes on the gardens of the colleges and on the University Park - Gunther, R. T. (Robert Theodore), 1869 -1940 (Parker, 1912)

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Palaeontographica (Theodor Fischer, 1916)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1916)

Pamphlets on forest protection (1900)

Pamphlets on forest utilization (1900)

Pamphlets on forestry. Grazing (1900)

Pamphlets on forestry. History (1900)

Pamphlets on forestry in Canada (1900)

Pamphlets on forestry in Montana (1900)

Pamphlets on forestry in Nebraska (1900)

Pamphlets on forestry in New York (1900)

Pamphlets on forestry in Pennsylvania (1900)

Pamphlets on silviculture (1899)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1925)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1935)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1936)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1959)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1963)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1982)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1987)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1988)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1993)

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Papers presented at the Celebration of the Twentieth Anniversary of the New York Botanical Garden, September 6-9, 1915. Published by the aid of the David Lydig Fund, bequethed by Charles P. Daly - New York Botanical Garden (1916)

Paris International Exhibition, 1900 - Macoun, James Melville, 1862 -1920 (s.n.], 1900)

Park and cemetery - Haight, R. J. (Rufus J.) (R.J. Haight, 1898)

Parks and pleasure grounds, or, Practical notes on country residences, villas, public parks, and gardens - Smith, Charles H. J. (Reeve and Co, 1852)

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

Pharmaceutical journal and transactions - Pharmaceutical Society of Great Britain (J. & A. Churchill, 1868)

Phenology and other features of the flowering of pines, with special reference to Pinus monticola Dougl - Bingham, Richard T. (Intermountain Forest and Range Experiment Station, 1957)