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Prodromus florae neomarchicae secundum systema proprium conscriptus atque figuris XX coloratis adornatus - Rebentisch, Johann Friedrich, 1772 -1810 (Impensis F. Schüppel, 1804)

Productive plant husbandry; a text-book for high schools, including plant propagation, plant breeding, soils, field crops gardening, fruit growing, forestry, insects, plant diseases and farm management - Davis, Kary Cadmus, 1867 -1936 (J.B. Lippincott company, 1917)

Prof. dr. Thomé's Flora von Deutschland, Österreich und der Schweiz, in wort und bild, für schule und haus ... mit ... - Migula, W. (Walter), 1863 -1938 (1913)

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Die Protozoen als Krankheitserreger : Nachtraege - Pfeiffer, L. (Ludwig), 1842 -1921 (G. Fischer, 1895)

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

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O que todos devemos saber os parasitas vegetaes e animaes que se implantam no nosso corpo e os males que nos causam - Barroso, Sebastião (Sebastião M.) (Livraria Catalina, 1922)

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Quince culture : An illustrated hand-book for the propagation and cultivation of the quince with descriptions of its varieties, insect enemies, diseases, and their remedies - Meech, William Witler, 1825 - (Orange Judd company, 1896)

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Raising turkeys, ducks, geese, game birds - Jull, Morley A. (Morley Allan), 1885 -1959 (McGraw-Hill book company, inc, 1947)

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Recreatio mentis, et oculi : in obseruatione animalium testaceorum curiosis naturæ inspectoribus Italico sermone prim um proposita - Buonanni, Filippo, 1638 -1725 (Ex typographia Varesij, 1684)

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Reduction of all the genera of plants contained in the Catalogus plantarum Americæ septentrionalis, of the late Dr. Muhlenberg, to the natural families of Mr. de Jussieu's system : For the use of the gentlemen who attended the course of elementary and philosophical botany in Philadelphia, in 1815 - Correia da Serra, José Francisco, 1750 -1823 (Published by Solomon W. Conrad, no. 87, Market Street, 1815)

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Rendiconti - Accademia nazionale dei Lincei. Classe di scienze fisiche, matematiche e naturali. (1916)

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Rendiconto delle adunanze e de' lavori dell'Accademia delle Scienze sezione della Società Reale Borbonica di Napoli - Accademia delle Scienze di Napoli (Società Reale Borbonica, 1852)

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)

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Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1901)

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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, 1895)

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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, 1889)

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Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1961)

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

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