The orchids of the Cape Peninsula - Bolus, Harry, 1834 -1911 (the Society, 1888)

Orchids: their culture and management - Watson, William, 1858 -1925 (L. U. Gill, 1903)

Orchids; their culture and management. With descriptions of all the kinds in general cultivation - Bean, W. J. (William Jackson), 1863 -1947 (L. U. Gill, 1890)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1906)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1909)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1910)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1914)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1919)

Le origini umane; ricerche paleontologiche - Sergi, Giuseppe, 1841 -1936 (Fratelli Bocca, 1913)

Ornamental trees, evergreens, windbreaks, fruits, shrubs : spring 1945 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.V. Bailey Nurseries, 1945)

The Ornithologist and oölogist (1881)

The ornithology of Francis Willughby of Middleton in the county of Warwick, esq. ... : in three books : wherein all the birds hitherto known, being reduced into a method sutable [i.e. suitable] to their natures, are accurately described : the descriptions illustrated by most elegant figures, nearly resembling the live birds, engraven in LXXVIII copper plates - Ray, John, 1627 -1705 (Printed by A.C. for John Martyn, 1678)

Otia botanica Hamburgensia :Fasciculus primus [-secundus, pars prima] - Reichenbach, H. G. (Heinrich Gustav) 1824 -1889 (Typis T. T. Meissneri, 1878)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1903)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1917)

Our fall, 1956 spring, 1957 catalogue - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Baier Lustgarten Farms and Nurseries, 1956)

Our new guide to rose culture : 1905 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1906)

Our sheep and the tariff - Lewis, William Draper, 1867 -1949 (University of Pa. press co, 1890)

Our South African flora = Ons Suid-Afrikaanse plantegroei - Compton, R. H. (Cape Times, 1900)

Our wholesale list to the trade : January 5, 1942 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Summit Nurseries, 1942)

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

The outlook for timber in the United States - United States. Forest Service. (For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1973)

Oversigt over de i arktiske region hidtil fundne lepidoptera - Schøyen, Wilhelm Maribo, 1844 -1918 (Alb. Cammermeyer, 1880)

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, 1859)

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, 1862)

Owlet moths (Phalaenidae) taken at light traps in Kansas and Nebraska - Walkden, H. H. (Herbert Halden), 1893 - (U.S. Dept. of Agriculture, 1942)

Own-root lilacs, mock orange, flowering almonds, plums, etc. : price list for spring 1951 (revised March 1st) - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Edw. J. Gardner Nursery, 1951)

Pacific salmon fisheries - Cobb, John N. (John Nathan), 1868 -1930 (Govt. Print. Off, 1917)

Palaeontographica (Theodor Fischer, 1908)

Palaeontographica Americana - Paleontological Research Institution (Ithaca, N.Y.) (Paleontological Research Institution, 1941)

Palaeontographica Americana - Paleontological Research Institution (Ithaca, N.Y.) (Paleontological Research Institution, 1970)

Palaeontology - Palaeontological Association (Palaeontological Association, 1990)

Palaeontology - Palaeontological Association (Palaeontological Association, 1995)

Palaeontology - Palaeontological Association (Palaeontological Association, 1998)

The Paleozoic fishes of North America / by John Strong Newberry - Newberry, J. S. (John Strong), 1822 -1892 (Govt. print. off, 1889)

Palestine Exploration Fund : quarterly statement - Palestine Exploration Fund. (The Fund, 1897)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1918)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1877)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1883)

Papers from the Tortugas Laboratory of the Carnegie Institution of Washington - Carnegie Institution of Washington. Department of Marine Biology. (Carnegie Institution of Washington, 1918)

Part I. Palæontology - Hall, James, 1811 -1898 (Govt. print. off, 1877)

Parte práctica de botánica del caballero Cárlos Linneo, que comprehende las clases, órdenes, géneros, especies y variedades de las plantas, con sus caracteres genéricos y especificos, sinónimos mas selectos, nombres triviales, lugares donde nacen, y propriedades - Linné, Carl von, 1707 -1778 (En la Imprenta Real, 1784)

Pasteurization and milk preservation, with a chapter on selling milk - Monrad, John Henry, 1848 - (J. H. Monrad, 1895)

Paxton's Botanical dictionary; comprising the names, history, and culture of all plants known in Britain; with a full explanation of technical terms. New ed. including all the new plants up to the present year - Paxton, Joseph, Sir, 1803 -1865 (Bradbury, Evans, & co, 1868)

Paxton's magazine of botany, and register of flowering plants - Paxton, Joseph, Sir, 1803 -1865 (Orr and Smith [etc.], 1836)

Paxton's magazine of botany, and register of flowering plants - Paxton, Joseph, Sir, 1803 -1865 (Orr and Smith [etc.], 1844)

Paxton's magazine of botany, and register of flowering plants - Paxton, Joseph, Sir, 1803 -1865 (Orr and Smith [etc.], 1845)

Paxton's magazine of botany, and register of flowering plants - Paxton, Joseph, Sir, 1803 -1865 (Orr and Smith [etc.], 1849)

A peony check-list including the leading varieties of peonies of which authentic descriptions can be found in horticultural literature ... - Coit, J. Eliot, 1880 - (New York State College of Agriculture at Cornell University; Dept. of Horticulture, 1907)

Pescatorea : iconographie des orchide´es /par J. Linden... avec la collaboration de mm. J.E. Planchon, m. G. Reichenbach, G. Luddemann - Reichenbach, H. G. (Heinrich Gustav) 1824 -1889 (M. Hayez, 1860)

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

Peter Henderson & Co.'s September to December 1899 wholesale catalogue of bulbs, plants and seeds, tools, fertilizers, insecticides, and requisites for the greenhouse, garden and farm - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1899)

Petrefactenkunde Deutschlands / von Fr. Aug. Quenstedt - Quenstedt, Fr. Aug. von (Friedrich August), 1809 -1889 (L.F. Fues, 1873)

Petroleum withdrawals and restorations affecting the public domain - Ball, Max W. (Max Waite), 1885 -1954 (Govt. print. off, 1917)

Pflanzenbiologische Untersuchungen : nebst algologischen Schluszbemerkungen - Hansgirg, Antonin, 1854 -1917 (Alfred Hölder, 1904)

Pflanzengeographie, nach Alexander von Humboldt's werke ueber die geographische Vertheilhung der Gewächse : mit Anmerkungen, grösseren Beilagen aus andern pflanzengeographischen Schriften und einem Excurse über die bei pflanzengeographischen Floren-Vergleichungen nöthigen Rücksichten - Humboldt, Alexander von, 1769 -1859 (bei Wilhelm Gottlieb Korn, 1831)

Pflanzenphänologische Beobachtungen in Finland ... - Brotherus, V. F. (Viktor Ferdinand), 1849 -1929 (Druckerei der Finnischen Litteraturgesellschaft, 1885)

Die Pflanzenwelt Afrikas, insbesondere seiner tropischen Gebiete : Grundzge der Pflanzenverbreitung im Afrika und die Charakterpflanzen Afrikas - Engler, Adolf, 1844 -1930 (W. Engelman, 1910)

Die Pflanzenwelt Ost-Afrikas und der Nachbargebiete - Engler, Adolf, 1844 -1930 (D. Reimer, 1895)

Phanerogamic flora of the divisions of Uitenhage and Port Elizabeth : with a sketch map - Schönland, S. 1860 - (Govt. Print. and Stationery Office, 1919)

Phenology and production studies on semi-arid shrub types : annual progress report : 1981 results - United States. Bureau of Land Management. (Wyoming Agricultural Experiment Station, 1982)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1914)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1916)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1919)

The Philosophical magazine and journal : comprehending various branches of science, the liberal and fine arts, agriculture, manufactures, and commerce (R. Taylor, 1822)

Philosophical notes on botanical subjects - Bonavia, E. (Emanuel), 1829 -1908 (Eyre and Spottiswoode, 1892)

Philosophical transactions. Series A: Mathematical and physical sciences - Royal Society (Great Britain) (1912)

Physics of fluids, maneuverability and ocean platforms, ocean waves, and ship-generated waves and wave resistance - United States. Office of Naval Research. (Office of Naval Research; [for sale by the Supt. of Docs., U.S. Govt. Print. Off, 1968)

Physiologie du système nerveux, ou Recherches et expériences sur les diverses classes d'appareils nerveux, les mouvemens, la voix, la parole, les sens et les facultés intellectuelles - Jourdan, A.-J.-L. (Antoine Jacques Louis), 1788 -1848 (Chez J. B. Baillière [etc., etc.], 1840)

The physiology of reproduction - Marshall, F. H. A. (Francis Hugh Adam), 1878 -1949 (Longmans, Green and Co, 1910)

Physiotypia plantarum Austriacarum : die Gefässpflanzen Österrichs in Naturselbstdruck mit besonderer Berücksichtigung der Nervation in den Flächenorganen der Pflanzen - Ettingshausen, Constantin, Freiherr von, 1826 -1897 (F. Tempsky in Prag, 1873)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1980)

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

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1986)