Recueil des mémoires et des travaux - Société botanique du Grand-Duché de Luxembourg. (La Société, 1897)

Reise der o¨sterreichischen Fregatte Novara um die Erde in den Jahren 1857, 1858, 1859 unter den Befehlen des Commodore B. von Wu¨llerstorf-Urbair. Erster Band: Sporenpflanzen, Botanischer Theil (Kaiserlich-Kniglichen Hof- und Staatsdruckerei, in Commission bei K. Gerold, 1870)

Reise der österreichischen Fregatte Novara um die Erde in den Jahren 1857, 1858, 1859 unter den Befehlen des Commodore B. von Wüllerstorf-Urbair - Österreichische Akademie der Wissenschaften. (Kaiserlich-Königliche Hof- und Staatsdruckerei; in Commission bei K. Gerold's Sohn, 1870)

Reise in Ostafrika in den Jahren 1903-1905 : mit Mitteln der Hermann und Elise geb. Heckmann Wentzel-Stiftung : Wissenschaftliche Ergebnisse - Voeltzkow, Alfred, 1860 -1946 (E. Schweizerbartsche Verlagsbuchhandlung, 1908)

Reise in Ostafrika in den Jahren 1903-1905 : mit Mitteln der Hermann und Elise geb. Heckmann Wentzel-Stiftung : Wissenschaftliche Ergebnisse - Voeltzkow, Alfred, 1860 -1946 (E. Schweizerbartsche Verlagsbuchhandlung, 1917)

Die Reizbewegungen der Pflanzen - Pringsheim, Ernst G. (Ernst Georg), 1881 - (J. Springer, 1912)

Reliquiae Dewevreanae ou Enumération systématique des plantes récoltées par Alfr. Dewèvre en 1895-96 dans l'Etat Indépendant du Congo - De Wildeman, Emile 1866 -1947 (1901)

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

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

Report - Western Committee on Crop Pests. (Agriculture Canada Research Station, 1983)

Report - Western Committee on Crop Pests. (Agriculture Canada Research Station, 1987)

Report - Western Committee on Crop Pests. (Agriculture Canada Research Station, 1988)

Report and proceedings of the Chester Society of Natural Science, Literature and Art - Chester Society of Natural Science Literature; Art. (1898)

Report and transactions - Guernsey Society of Natural Science; Local Research. (The Society, 1890-1922, 1895)

Report of the Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, Office of the Regents, 1868)

Report of the Botanist - New York (State). State Botanist. (James B. Lyon, State Printer, 1867)

Report of the Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, Office of the Regents, 1878)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1932)

Report of the Chief - Forest Service - United States. Forest Service. (Forest Service, U.S. Dept. of Agriculture; [for sale by the Supt. of Docs., U.S. Govt. Print Off.], 1955)

Report of the Chief - Forest Service - United States. Forest Service. (Forest Service, U.S. Dept. of Agriculture; [for sale by the Supt. of Docs., U.S. Govt. Print Off.], 1957)

Report of the Geological Survey of Ohio - Geological Survey of Ohio. (Nevins & Myers, state printers, 1893)

Report of the geological survey of Ohio - Geological Survey of Ohio. (Nevins & Meyers, 1893)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1905)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1911)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1912)

Report of the Minister of Lands and Forests of the Province of Ontario - Ontario. Dept. of Lands; Forests. (Published by Clarkson W. James, 1927)

Report of the Minister of Lands and Forests of the Province of Ontario - Ontario. Dept. of Lands; Forests. (Published by Clarkson W. James, 1931)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1896)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1916)

Report of the state botanist for 1924 - New York (State). Botanist. (University of the State of New York, 1925)

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 of the State Entomologist to the Regents of the University of the State of New York - University of the State of New York. (University of the State of New York], 1885)

Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76 under the command of Captain George S. Nares ... and the late Captain Frank Tourle Thomson, R.N - Thomson, C. Wyville, Sir, (Charles Wyville), 1830 -1882 (Neill, 1885)

Report on the vegetation of the Andaman Islands. Accompanied by a report on the forests and a map - Kurz, Wilhelm Sulpiz, 1834 -1878 (Office of Superintendent of Government Printing, 1870)

Reports of the Survey. Botanical series - Geological; Natural History Survey of Minnesota. (1892)

Research accomplishments - United States. Forest Service. (1970)

Research highlights : annual report - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (The Station, 1966)

Research summaries - U.S. Dairy Forage Research Center. (The Center, Agricultural Research Service, U.S. Dept. of Agriculture, 1995)

Researches on fungi - Buller, A. H. Reginald (Arthur Henry Reginald), 1874 -1944 (Longmans, Green, 1958)

Revista argentina de historia natural - Ameghino, Florentino, 1853 -1911 (J. Peuser)

Revista de la Facultad de Agronomía y Veterinaria - Universidad Nacional de La Plata. Facultad de Agronomía y Veterinaria. (La Facultad, 1910)

Revue bryologique et lichenologique - Muséum national d'histoire naturelle (France) (Museum national d'histoire naturelle, 1952)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1884)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1885)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1942)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1960)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1963)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1968)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1969)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1970)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1972)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1973)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1976)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1977)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1979)

Revue générale de botanique (Libraire générale de l'enseignement, 1894)

Revue générale de botanique (Libraire générale de l'enseignement, 1910)

Revue générale de botanique (Libraire générale de l'enseignement, 1920)

Revue horticole (Librairie agricole de la maison rustique, 1888)

Revue mycologique (Bureaux de la rédaction, 1879)

Revue mycologique (Bureaux de la rédaction, 1880)

Revue mycologique (Bureaux de la rédaction, 1881)

Revue mycologique (Bureaux de la rédaction, 1882)

Revue mycologique (Bureaux de la rédaction, 1883)

Revue mycologique (Bureaux de la rédaction, 1884)

Revue mycologique (Bureaux de la rédaction, 1889)