The North American entomologist - Grote, Augustus Radcliffe, 1841 -1903 (Reinecke & Zesch, 1879)

Nuove relazioni intorno ai lavori - R. Stazione di entomologia agraria in Firenze. (1900)

Nuove relazioni intorno ai lavori - R. Stazione di entomologia agraria in Firenze. (1902)

The Nut-grower; devoted to the interests of the National Nut-growers' Association - National Nut-growers Association. (1902)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 2010)

Official report ... of the ... convention ... - California Fruit Growers' Convention. (1902)

Official report ... of the ... convention ... - California Fruit Growers' Convention. (1904)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1896)

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

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, 1903)

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

Orchard and garden diseases, 1908, No. 138 - New Zealand. (New Zealand Government, 1908)

Ornamental gardening in Florida - Simpson, Charles Torrey, 1846 -1932 (The author, 1916)

Our native ferns and their allies : with synoptical descriptions of the American pteridophyta north of Mexico - Underwood, Lucien Marcus, 1853 -1907 (Henry Holt and company, 1888)

Outlines of entomology - Murtfeldt, Mary Esther, 1848 -1913 (Tribune printing company, state printers and binders, 1891)

Oversigt over det Kongelige Danske videnskabernes selskabs forhandlinger = Bulletin de l'Académie royale des sciences et des lettres de Danemark - Kongelige Danske videnskabernes selskab. (A.F. Høst, 1894)

[Pamphlets on agriculture in Guam] (s.n, 1905)

Pamphlets on forest protection (1900)

Pamphlets on forestry in Maine (1900)

Pamphlets on forestry in Ohio (1900)

Pamphlets on silviculture (1899)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1965)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1979)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1985)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 2002)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1918)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1917)

Papers on Coccidae or scale insects - United States. Bureau of Entomology. (Government Printing Office, 1908)

Park and cemetery - Haight, R. J. (Rufus J.) (R.J. Haight, 1899)

Park and cemetery - Haight, R. J. (Rufus J.) (R.J. Haight, 1900)

Park and cemetery and landscape gardening - Haight, R. J. (Rufus J.) (R.J. Haight, 1911)

Park and cemetery and landscape gardening - Haight, R. J. (Rufus J.) (R.J. Haight, 1914)

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

Petites nouvelles entomologiques (E. Deyrolle, 1869)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1922)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1937)

Pflanzenschutz nach Monaten geordnet; eine Anleitung für Landwirte, Gärtner, Obstbaumzüchter &c - Hiltner, Lorenz (E. Ulmer, 1909)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1917)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1920)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1957)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1985)

Plant health care for woody ornamentals : a professional's guide to preventing and managing environmental stresses and pests - International Society of Arboriculture. (Cooperative Extension Service, College of Agricultural, Consumer and Environmental Sciences, University of Illinois at Urbana-Champaign, 1997)

Plant-quarantine import restrictions of the Union of Soviet Socialist Republics - United States. Office of Experiment Stations. (United States Department of Agriculture, Bureau of Entomology and Plant Quarantine, 1937)

Platanaceae through Myricaceae of New York State - Mitchell, Richard S., 1938 - (University of the State of New York, State Education Dept, 1988)

The plums of New York - New York (State). Dept. of Agriculture. (J.B. Lyon Company, state printers, 1911)

Pomona College journal of entomology - Pomona College (Claremont, Calif.). Department of Biology. (Published under the patronage of Ontario-Cucamonga Citrus Association by the Dept. of Biology of Pomona College, 1909)

Pomona College journal of entomology - Pomona College (Claremont, Calif.). Department of Biology. (Published under the patronage of Ontario-Cucamonga Citrus Association by the Dept. of Biology of Pomona College, 1910)

Proceedings - Entomological Society of Canada (1863-1871) (Entomological Society of Ontario, 1895)

Proceedings - Cambridge Philosophical Society. Mathematical and physical sciences - Cambridge Philosophical Society. (Cambridge Philosophical Society [etc.], 1917)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1899)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1913)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1841)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1892)

Proceedings of the California Academy of Sciences. 3d ser, Zoology - California Academy of Sciences (The Academy, 1902)

Proceedings of the California Academy of Sciences. 3d ser, Zoology - California Academy of Sciences (The Academy, 1901)