Rivista di patologia vegetale - Istituto di patologia vegetale (Università di Milano) (Tipografia del Seminario, 1913)

Rivista di patologia vegetale - Istituto di patologia vegetale (Università di Milano) (Tipografia del Seminario, 1916)

Rivista di patologia vegetale - Istituto di patologia vegetale (Università di Milano) (Tipografia del Seminario, 1920)

Rivista di patologia vegetale - Istituto di patologia vegetale (Università di Milano) (Tipografia del Seminario, 1923)

Rivista italiana di scienze naturali : periodico mensile premiato alle esposizioni nazionali di Palermo e di Milano ed a quella internazionale di Chicago (Ufficio, 1892)

Rivista italiana di scienze naturali : periodico mensile premiato alle esposizioni nazionali di Palermo e di Milano ed a quella internazionale di Chicago (Ufficio, 1890)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1937)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1945)

Romance of low life amongst plants : facts and phenomena of cryptogamic vegetation - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (Society for Promoting Christian Knowledge, 1893)

Rootrots and leafspots of grains and grasses in the northern Great Plains and western states - United States. Plant Disease Survey. (Plant Disease Survey, Division of Mycology and Disease Survey, Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, United States Department of Agriculture, 1946)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1902)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1915)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1952)

Schedae ad Kryptogamas exsiccatas - Naturhistorisches Museum (Austria) (A. Holder, 1894)

Science - American Association for the Advancement of Science. ([s.n.], 1893)

Science - American Association for the Advancement of Science. ([s.n.], 1895)

Science - American Association for the Advancement of Science. ([s.n.], 1902)

Science - American Association for the Advancement of Science. ([s.n.], 1907)

Science - American Association for the Advancement of Science. ([s.n.], 1915)

The science and practice of farming during 1910 in Great Britain (England, Wales, Scotland) as seen through the scientific and agricultural press - International Institute of Agriculture. Bureau of Agricultural Science; Practice (Printed by the Unione Editrice, 1910)

Scientific reports of the Agricultural Research Institute, Pusa - Agricultural Research Institute (India) (Supt. Govt. Print., India, 1916)

Scientific survey of Porto Rico and the Virgin Islands - New York Academy of Sciences. (The Academy, 1926)

The Scottish naturalist - Perthshire Society of Natural Science. (Cowan & Co. [etc.], 1885)

The Scottish naturalist - Perthshire Society of Natural Science. (Cowan & Co. [etc.], 1887)

The Scottish naturalist - Perthshire Society of Natural Science. (Cowan & Co. [etc.], 1889)

The Scottish naturalist - Perthshire Society of Natural Science. (Cowan & Co. [etc.], 1891)

Scrinia florae selectae - Magnier, Charles.

A second edition of Webber's "Appendix to the catalogue of the flora of Nebraska" - Bessey, Charles E. (Charles Edwin), 1845 -1915 ([University of Nebraska?, 1892)

A second Ohio weed manual : general weed questions : revised descriptive illustrated list of Ohio weeds - Selby, A. D. (Augustine Dawson), 1859 -1924 (Ohio Agricultural Experiment Station, 1906)

Semi-annual report on essential oils, synthetic perfumes, &c - Schimmel & Co. (Schimmel & Co, 1914)

Semi-annual report on essential oils, synthetic perfumes, &c - Schimmel & Co. (Schimmel & Co, 1918)

Semi-monthly news-letter - United States. Bureau of Plant Industry. Division of Fruit; Vegetable Crops; Diseases.

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1932)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1934)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1935)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1936)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1937)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1938)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1939)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1940)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1941)