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The Quarterly journal of the Geological Society of London - Geological Society of America. (1868)

The Quarterly journal of the Geological Society of London - Geological Society of America. (1869)

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Rainbow iris offerings, 1946 : gladiolus, lilies, unusual seeds, bulbs, plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rainbow Hybridizing Gardens, 1946)

Rare and local trees in the national forests - United States. Forest Service. (Dept. of Agriculture, Forest Service, 1977)

Rare plants : Christmas - 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rare Plant Club, 1950)

Rare plants : our complete catalog of rare plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rare Plant Club, 1953)

Rare plants : our complete catalog of rare plants : spring 1956 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rare Plant Club, 1956)

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)

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Reforestation on the national forests - Tillotson, C. R. (U.S. Dept. of Agriculture, 1917)

Le Règne végétal; divisé en: Traité de botanique, Flore médicale, usuelle et industrielle, Horticulture théorique et pratique, Plantes agricoles et forestières, Histoire biographique et bibliographique de la botanique - Réveil, O. (Oscar), 1821 -1865 (L. Guérin, 1870)

Relative resistance of various conifers to injection with creosote - Teesdale, Clyde Harry. (U.S. Dept. of Agriculture, 1914)

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

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Report of the Second Norwegian Arctic Expedition in the "Fram," 1898-1902 - Norske videnskaps-akademi i Oslo. (In commission by T.O. Brøgger, 1907)

Report of the second Norwegian Arctic Expedition in the "Fram", 1898-1902. Published by Videnskabs-selskabet i Kristiania, at the expense of the Fridjof Nansen Fund for the Advancement of Science - Norske videnskaps-akademi i Oslo. (T.O. Brøgger, 1907)

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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, 1909)

Report of the United States Geological Survey of the territories - Lesquereux, Léo, 1806 -1889 (Govt. Print. Off, 1873)

Report on Tertiary plants of British Columbia collected by Lawrence M. Lambe in 1906, together with a discussion of previously recorded Tertiary floras - Geological Survey of Canada (Government Printing Bureau, 1908)

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Report on the forest conditions of the Rocky Mountains, and other papers; with a map showing location of forest areas on the Rocky Mountain range (Govt. print. off, 1888)

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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)