Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1956)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1960)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1963)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1967)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1954)

Proceedings of the Bournemouth Natural Science Society - Bournemouth Natural Science Society (1918)

Proceedings of the Bournemouth Natural Science Society - Bournemouth Natural Science Society (1920)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1888)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1892)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1944)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1988)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2010)

Proceedings of the Delaware County Institute of Science - Delaware County Institute of Science. (The Institute, 1908)

Proceedings of the Folkestone Natural History & Microscopical Society - Folkestone Natural History & Microscopical Society. (1868)

Proceedings of the Fourth Lake States Forest Tree Improvement Conference, October 6 & 7, 1959 - Lake States Forest Experiment Station (Saint Paul, Minn.) (Lake States Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1960)

Proceedings of the International Ornithological Congress (Australian Academy of Science [etc.], 1955)

Proceedings of the International Ornithological Congress (Australian Academy of Science [etc.], 1980)

Proceedings of the International Ornithological Congress (Australian Academy of Science [etc.], 1991)

Proceedings of the Linnean Society of London - Linnean Society of London. (Published for the Linnean Society of London by Academic Press [etc.], 1875)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1926)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1928)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1956)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1981)

Proceedings of the Natural History Society of Glasgow - Natural History Society of Glasgow. (Natural History Society of Glasgow, 1869)

Proceedings of the Natural History Society of Glasgow - Natural History Society of Glasgow. (Natural History Society of Glasgow, 1875)

Proceedings of the Natural History Society of Glasgow - Natural History Society of Glasgow. (Natural History Society of Glasgow, 1851)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 2001)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 2010)

Proceedings of the Philosophical Society of Glasgow - Philosophical Society of Glasgow.

Proceedings of the Rochester Academy of Science - Rochester Academy of Science. (The Academy, 1894)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1884)

Proceedings of the Royal Society of London. Series B, Containing papers of a Biological character - Royal Society (Great Britain) (Printed for the Royal Society and sold by Harrison & Sons, 1913)

Proceedings of the Royal Society of Victoria - Royal Society of Victoria (Melbourne, Vic.) (The Society, 1922)

Proceedings of the section of sciences - Koninklijke Akademie van Wetenschappen (Netherlands) (Johannes Müller, 1902)

Proceedings of the Twenty-first Southern Forest Tree Improvement Conference, June 17-20, 1991, Knoxville, Tennessee - Southern Forest Tree Improvement Committee. (National Technical Information Service, 1991)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1913)

Proceedings of the XIIIth Congress of Arachnology : Geneva, 3-8 September 1995 - Mahnert, Volker. ([s.n.], 1996)

Proceedings, resolutions, and summary of statements (1921)

Procès-verbaux - Société Linnéenne de Bordeaux. (1901)

Prodrome de la flore Belge - De Wildeman, Emile 1866 -1947 (Alfred Castaigne, 1898)

Prodrome de la flore Belge - De Wildeman, Emile 1866 -1947 (Alfred Castaigne, 1899)

Prodrome de la flore belge - Wildeman, E. de (Emile), 1866 -1947 (A. Castaigne, 1898)

Prodrome de la flore du plateau central de la France ... - Lamotte, Martial, 1820 -1883 (G. Masson, 1877)

Prodromo della flora toscana, ossia, Catalogo metodico delle piante che nascono salvatiche in Toscana e nelle sue isole, o che vi sono estesamente coltivate, con la indicazione dei luoghi nei quali si trovano, del tempo della loro fioritura e fruttificazione, dei loro nomi volgari ed usi - Caruel, Teodoro, 1830 -1898 (Coi tipi di F. Le Monnier, 1860)

Prodromul florei române; sau, Enumeratiunea plantelor pana asta-di cunoscute in Moldova si Valachia - Brândză, D. (Dimitrie), 1847 -1895 (Tip. Academiei Romane, 1879)

Prodromus einer Flora des Kronlandes Salzburg und dessen angränzenden Ländertheilen ... - Hinterhuber, Julius, 1810 -1880 (Druck der Oberer'schen Buchdr, 1851)

Prodromus florae argentoratensis - Spielmann, Jacob Reinbold, 1722 -1783 (Apud J.G. Bauerum, 1766)

Prodromus florae Batavae - Nederlandsche Botanische Vereeniging, Leyden. (F.E. MacDonald, 1866)

Prodromus florae Batavae - Dozy, F. (Frans), 1807 -1856 (Sumptibus Societatis, apud J. Hazenberg, 1850)

Prodromus florae fossilis Senogalliensis - Massalongo, Abramo, 1824 -1860 (Tip. Bernardoni, 1854)

Prodromus florae Hercyniae; oder, Verzeichniss der in dem Harzgebiete wildwachsenden Pflanzen, nach dem Sexualsystem geordnet - Hampe, Ernst, 1795 -1880 (Gebauer, 1836)

Prodromus florae Monasteriensis Westphalorum. Phanerogamia - Bönninghausen, Clemens Maria Franz von, 1785 -1864 (F. Regensberg, 1824)

Prodromus florae Novo-Granatensis - Planchon, Jules-Emile, 1823 -1888 (V. Masson, 1862)

Prodromus florae stargardiensis : continens plantas in Ducatu Megapolitano-Stargardiensi S. Strelitzensi sponte provenientes - Schultz, Karl Friedrich, 1765 -1837 (sumtibus C. F. E. Spaethen, 1806)

Prodromus florae veronensis - Goiran, A. (Agostino), 1835 -1909 (1882)

Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta - Candolle, Augustin Pyramus de, 1778 -1841 (Sumptibus Sociorum Treuttel et Würtz, 1864)

ProHort - Center for Urban Horticulture (1987)

Promenades d'un botaniste dans un coin des Ardennes belges - Bastelaer, Désiré Alexandre van, 1823 -1907 (G. Mayolez, 1864)

Le propriétaire-planteur: semer et planter. Choix des terrains–semis–plantations forestières et d'agrément–entretien des massifs–élagage–description et emploi des essences forestières indigènes et exotiques, etc. Traité pratique et économique du reboisment et des plantations des parcs et jardins - Cannon, David (J. Rothschild, 1894)

Le propriétaire-planteur; semer et planter traité pratique et économique des reboisements et des plantations des parcs et jardins - Cannon, David (L. Laveur, 1906)

Prospetto della flora ligustica e dei zoofiti del more Ligustico - De Notaris, Giuseppe, 1805 -1877 (Tip. Ferrando, 1846)

Protected Areas in Eastern and Central Europe and the USSR (an interim review) (1990)

Protected Areas of the World: a review of National Systems. Vol 2: Palearctic (1991)

Protected Landscapes: experience around the world. Prepared for the International Symposium on Protected Landscapes, Grange-over-Sands, England 5-10 October 1987 (1987)

The protection of beans, peas and lentils, 1979-April 1990 : citations from AGRICOLA concerning diseases and other environmental considerations - National Agricultural Library (U.S.) (National Agricultural Library, 1990)

A provisional host-index of the fungi of the United States - Farlow, W. G. (William Gilson), 1844 -1919 (1888)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2012)

Pteridologist - British Pteridological Society. (The Society, 2020)

Publicaciones del Departamento de Zoología - Universidad de Barcelona. Departamento de Zoología. (Ediciones de la Universidad de Barcelona, 1986)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1930)

Quality liners : fall 1949 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (John Vermeulen & Son, 1949)

Quality nursery stock : wholesale list, 1950-51 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rich & Sons Nursery, 1950)

The quantitative method in biology - MacLeod, Julius, 1857 -1919 (University Press, 1919)

The quantitative method in biology - MacLeod, Julius, 1857 -1919 (University press, 1919)

The Quarterly journal of science (J. Churchill and Sons, etc, 1865)

Quarterly journal of the Florida Academy of Sciences - Florida Academy of Sciences. (Florida Academy of Sciences, 1956)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1863)

Quarterly Magazine of the High Wycombe Natural History Society - High Wycombe Natural History Society. (1866)

Quarterly summary of re-identifications, April, May, June 1961 : Change No. 5 - United States. Bureau of Plant Industry, (New Crops Research Branch, Plant Industry Station, 1960)

Quarterly summary of re-identifications, January, February, March 1962 : Summary No. 8 - United States. Bureau of Plant Industry, (New Crops Research Branch, Plant Industry Station, 1960)

Quarterly summary of re-identifications, October, November, December 1963 : Summary No. 15 - United States. Bureau of Plant Industry, (New Crops Research Branch, Plant Industry Station, 1960)

Quarterly summary of re-identifications, October, November, December 1961 : Summary No. 7 - United States. Bureau of Plant Industry, (New Crops Research Branch, Plant Industry Station, 1960)

The Queensland Naturalist - Queensland Naturalists' Club. (Queensland Naturalists' Club], 1936)

Rambles in search of wild flowers, and how to distinguish them - Plues, Margaret (Journal of horticulture and cottage gardener, 1864)

Rambles of a naturalist round Folkestone : with occasional papers on the fauna and flora of the district, to which are added lists of plants, lepidoptera, birds, and land and freshwater shells - Ullyett, Henry. (J. English, 1880)

Rapport sur les substances végétales et animales, fait à la commission française du jury international de l'Exposition universelle de Londres - Payen, M. (Anselme), 1795 -1871 (Imprimerie impériale, 1855)

Rapporto al consiglio federale sulle foreste delle alte montagne della Svizzera dietro l' ispezione : eseguita negli anni 1858, 1859 e 1860 (Francesco Veladini E C, 1864)

Die Raupen der gross-schmetterlinge Europas - Hofmann, Ernst, 1837 -1892 (Verlag der C. Hoffmann, 1893)