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Proceedings and transactions of the British Entomological and Natural History Society - British Entomological; Natural History Society. (British Entomological and Natural History Society, 1987)

Proceedings and transactions of the Royal Society of Canada. Délibérations et mémoires de la Société royale du Canada - Royal Society of Canada. (Société royale du Canada, 1922)

Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1953)

Proceedings, Conifer Tree Seed in the Inland Mountain West Symposium : Missoula, Montana, August 5-6, 1985 - Intermountain Research Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1986)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1884)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1902)

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

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Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1965)

Proceedings of the Bournemouth Natural Science Society - Bournemouth Natural Science Society (1979)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1935)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1922)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1974)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1979)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1990)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1997)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 2000)

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Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1927)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1948)

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Proceedings of the Rochester Academy of Science - Rochester Academy of Science. (The Academy, 1910)

Proceedings of the Staten Island Association of Arts and Sciences - Staten Island Association of Arts; Sciences. (The Association, 1916)

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Proceedings, resolutions, and summary of statements (1921)

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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, 1874)

Products of American forests - Forest Products Laboratory (U.S.) (U.S. Govt. print. off, 1946)

Profit proved list on lining out stock for January, 1949 : (wholesale only) - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Monrovia Nursery Company, 1949)

Progressus rei botanicae = Fortschritte der Botanik = Progrès de la botanique = Progress of botany - Association internationale des botanistes. (G. Fischer, 1907)

Progressus rei botanicae = Fortschritte der Botanik = Progrès de la botanique = Progress of botany - Association internationale des botanistes. (G. Fischer, 1914)

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A provisional host-index of the fungi of the United States - Farlow, W. G. (William Gilson), 1844 -1919 (1891)

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

pu yang zhi wu zhi - Zhang, Junpu, Wu Hongchen, Zhu Xuewen & Ma Yipin (zhong guo ke xue ji shu chu ban she, 1996)

Putney's 1957 garden book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Putney Nursery, 1957)

Putney's 1958 garden book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Putney Nursery, 1958)

Putney's 1959 garden book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Putney Nursery, Inc, 1959)

Quality and value of important types of peat material : a classification of peat based upon its botanical composition and physical and chemical characteristics - Dachnowski-Stokes, Alfred P. (Alfred Paul), 1875 -1949 (U.S. Dept. of Agriculture, 1919)

Quality nursery stock : 1955-1956 : wholesale list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rich & Sons Nursery, 1955)

Quality nursery stock : wholesale list, 1953-1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rich & Sons Nursery, 1953)

Quality nursery stock : wholesale list, spring 1958 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rich & Sons Nursery, 1958)

A range-wide assessment of Port-Orford-cedar (Chamaecyparis lawsoniana) on federal lands - United States. Bureau of Land Management. (Bureau of Land Management, Oregon State Office, 2003)

Ransom's 1946 catalog : evergreens, seeds, bulbs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ransom Nursery, 1946)

Rare bryophytes of Oregon - United States. Bureau of Land Management. (U.S. Department of the Interior, Bureau of Land Management, Salem District, 2016)

Rare flower bulletin. bulletin no. 7 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rex D. Pearce, 1948)

Reading Naturalist. Reading - Reading Natural History Society.

Recherches sur les végétaux fossiles de Meximieux - Marion, A.-F.‏ ‎ (Antoine Fortuné),‏ ‎ 1846 -1900 ([publisher not identified], 1872)

A record of the fungi named by J.B. Ellis - United States. Bureau of Plant Industry, Soils,; Agricultural Engineering. (Division of Mycology and Disease Survey, Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, U.S. Dept. of Agriculture, 1952)

Recueil de l'Institut botanique (Université de Bruxelles) - Institut botanique Léo Errera. (Henri Lamertin, 1902)

Reference catalog : ornamental trees, shrubs, evergreens, perennial plants, roses, etc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Southern Nursery and Landscape Company, 1940)

Regal evergreens - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Paramount Nurseries, 1931)

Regal evergreens : 20% discount on all orders received before April 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Paramount Nurseries, 1931)

The Relation of insects to slash disposal - United States. Bureau of Entomology. Division of Forest Insect Investigations. (U.S. Dept. of Agriculture, 1927)

Reliably hardy evergreens for fall planting : autumn 1915 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (New England Nurseries, 1915)

Reliably hardy evergreens for fall planting : autumn 1916 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (New England Nurseries, 1916)

Répertoire des noms génériques mentionnés dans l'Index kewensis et ses quinze premiers suppléments = Guide to the generic names appearing in the Index Kewensis and its fifteen supplements = Repertorio de los nombres genericos enumerados en el Index Kewensis y sus quince suplementos = Repertorium der im Index Kewensis und seinen fuenfzehn ersten Supplementen erwaehnten Gattungsnamen - Rouleau, Ernest 1916 -1991 (Châtelain, 1981)

Repertorium annuum literaturae botanicae periodicae - Bemmelen, J. A. van. (Erven Loosjes, 1873)

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1908)

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1905)

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1913)

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1914)

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Report of the Director to the Board of Trustees for the year ... - Chicago Natural History Museum. (The Museum, 1957)

Report of the entomologist - United States. Bureau of Entomology. (Gov't print. off, 1931)

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Report of the State Entomologist on injurious and other insects of the state of New York - Felt, Ephraim Porter, 1868 -1943 (Weed, Parsons and Co.; University of the State of New York, 1917)

Report on the forests of North America, exclusive of Mexico - Sargent, Charles Sprague, 1841 -1927 (Govt. Print. Off, 1884)

Report on the forests of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Govt. print. off, 1884)

Report on the forests of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (G.P.O, 1884)

Report on the relation of railroads to forest supplies and forestry : together with appendices on the structure of some timber ties, their behavior, and the cause of their decay in the road bed, on wood preservation, on metal ties, and on the use of spark arresters - Fernow, B. E. (Bernhard Eduard), 1851 -1923 (Dept. of Agriculture, Forestry Division, 1887)

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La reproducción forestal - Chile. Ministerio de Industria y Obras Públicas. Sección de Aguas i Bosques. (Imprenta moderna, 1906)

Resources of southern Alabama : a statistical guide for investors and settlers, with an exposition of some of the principles of economic geography - Geological Survey of Alabama. (Geological Survey of Alabama, 1920)

Resultate der Wissenschaftlichen Erforschung des Balatonsees - Hungary. Földmm̋uvelésügyi Minisztérium. (E. Hölzel, 1897)

Retail, 1941 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Princeton Nurseries, 1941)

Retail catalog : spring & summer 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Japanese Nursery, 1931)

Retail catalogue - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph A. Hren Nurseries, 1959)

Retail list, 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Berryhill Nursery Co, 1937)

Retail list, 1946 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bagatelle Nursery, 1946)

Retail list and wholesale list : shrubs, trees, vines, ferns, 1939-1940 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Tuttle Bros. Nurseries, 1939)

Retail list : shrubs and trees, vines and perennials, 1938-1939 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Tuttle Bros. Nurseries, 1938)

Retail list : shrubs, trees, vines, perennials, 1937-1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Tuttle Bros. Nurseries, 1937)

Retail price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Laird's Nurseries, 1958)

Retail price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Laird's Nurseries, 1957)

Retail price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Laird's Nurseries, 1959)

Retail price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Laird's Nurseries, 1956)

Retail price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (May Nursery Co, 1957)

Retail price list : 1927 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lindley Nurseries Inc, 1927)

Retail price list, 1935 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Princeton Nurseries, 1935)

Retail price list, 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Colonial Gardens, 1936)

Retail price list, 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Princeton Nurseries, 1936)