Contributions to the botany of Vermont - Middlebury College. (Botanical Dept., University of Vermont, 1898)

Contributions to the flora of Iowa. II-VI - Arthur, Joseph Charles, 1850 -1942 (1884)

Contributions to the fossil flora of the western territories ... - Lesquereux, Léo, 1806 -1889 (Govt. Print. Off, 1874)

Contributions towards a Cybele hibernica, being outlines of the geographical distribution of plants in Ireland - Moore, David, 1807 -1879 (Hodges, Smith, 1872)

Contributions towards a Cybele hibernica, being outlines of the geographical distribution of plants in Ireland - Moore, David, 1807 -1879 (E. Ponsonby, 1898)

Correspondence : Boissier (Edmond) and Engelmann (George), 1857-1880 - Boissier, Edmond, 1810 -1885 (1857)

Correspondence : Bolander (Henry) and Engelmann (George), 1863-1878 - Bolander, Henry N. (Henry Nicholas), 1831 -1897 (1863)

Correspondence : Bolander (Henry) and Engelmann (George), 1863-1878 - Bolander, Henry N. (Henry Nicholas), 1831 -1897 (1867)

Correspondence : Braun (Alexander) and Engelmann (George), 1866-1870 - Braun, Alexander, 1805 -1877 (1866)

Correspondence : Braun (Alexander) and Engelmann (George), 1866-1870 - Braun, Alexander, 1805 -1877 (1987)

Correspondence : Braun (Alexander) and Engelmann (George), 1866-1870 - Braun, Alexander, 1805 -1877 (1867)

Correspondence : Brendel (Frederick) and Engelmann (George), 1852-1883 - Brendel, Frederick, 1820 -1912 (1852)

Correspondence : Brunet (Ovide) and Engelmann (George), 1862-1869 - Brunet, Ovide, 1826 -1876 (1862)

Correspondence : Caspary (Robert) and Engelmann (George), 1857-1877 - Caspary, Robert, 1818 -1887 (1877)

Correspondence : Gattinger (Augustin) and Engelmann (George), 187?-1882 - Gattinger, Augustin, 1825 -1903 (1882)

Correspondence : Gattinger (Augustin) and Engelmann (George), 187?-1882 - Gattinger, Augustin, 1825 -1903 (1879)

Correspondence : Gay (Jacques) and Engelmann (George), 1853-1863 - Gay, Jacques Etienne, 1786 -1864 (1853)

Correspondence : Grisebach (August) and Engelmann (George), 1842-1864 - Grisebach, A. (August), 1814 -1879 (1842)

Correspondence : Hegelmaier (Christoph) and Engelmann (George), 1864-1880 - Hegelmaier, Christoph Friedrich, 1833 -1906 (1864)

Correspondence : Hilgard (Eugene) to Engelmann (George), 1847-1883 - Hilgard, Eugene W. (Eugene Woldemar), 1833 -1916 (1846)

Correspondence : Lenormand (Sébastien) and Engelmann (George), 1847-1871 - Lenormand, Sébastien René, 1796 -1871 (1847)

Correspondence : Luerssen (Christian) and Engelmann (George), 1882 - Luerssen, Christian, 1843 -1916 (1882)

Correspondence : Magnus (Paul) and Engelmann (George), 1880 - Magnus, P. (Paul), 1844 -1914 (1880)

Correspondence : Mettenius (Georg) and Engelmann (George), 1857-1865 - Mettenius, G. (Georg), 1823 -1866 (1857)

Correspondence : Motelay (Léonce) and Engelmann (George), 1880 - Motelay, L. (Léonce), 1830 -1917 (1880)

Correspondence : Sturm (Johann) and Engelmann (George), 1859 - Sturm, Johann Wilhelm, 1808 -1865 (1859)

Correspondence : Viaud-Grand-Marais (Ambroise) and Engelmann (George), 1883 - Viaud-Grand-Marais, Ambroise 1833 -1913 (1883)

Correspondence : Weber (Frédéric Albert) and Engelmann (George), 1865-1883 - Weber, Frédéric-Albert-Constantin 1830 -1903 (1865)

Correspondenz-blatt des Naturwissenschaftlichen Vereins (früher Zoologisch-mineralogischer Verein) in Regensburg - Naturwissenschaftlicher Verein Regensburg. (Naturwissenschaftlichen Verein, 1885)

The Cottage gardener (W.S. Orr, 1851)

Cours élémentaire de botanique et flore du Canada à l'usage des maisons d'éducation - Moyen, J. (Jean), 1828 -1899 (G.E. Desbarats, 1871)

Crossosoma - Southern California Botanists. (Southern California Botanists, Rancho Santa Ana Botanic Garden, 1991)

Crossosoma - Southern California Botanists. (Southern California Botanists, Rancho Santa Ana Botanic Garden, 1994)

Cryptogamae vasculares Quitenses :adiectis specibus in aliis provinciis ditionis Ecuadorensis hactenus detectis - Sodiro, Luis, 1836 -1909 (Typis Universitatis, 1893)

Cryptogamen - Schenck, Heinrich, 1860 -1927 (G. Fischer, 1902)

Cryptogamic botany - Cardot, Jules, 1860 -1934 (The Smithsonian Institution, 1910)

Cryptogamie. Algologie - Laboratoire de cryptogamie, Paris (ADAC, 1987)

Cryptogamie. Bryologie, lichenologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1986)

Cryptogamie. Bryologie, lichenologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1992)

Cunninghamia: A journal of plant ecology for eastern Australia - National Herbarium of New South Wales, (Royal Botanic Gardens, National Herbarium of New South Wales, 1993)

Cunninghamia: A journal of plant ecology for eastern Australia - National Herbarium of New South Wales, (Royal Botanic Gardens, National Herbarium of New South Wales, 1998)

Cunninghamia: A journal of plant ecology for eastern Australia - National Herbarium of New South Wales, (Royal Botanic Gardens, National Herbarium of New South Wales, 2005)

Current bibliography for aquatic sciences and fisheries - Food; Agriculture Organization of the United Nations. Fisheries Division. Biology Branch. (Taylor & Francis ltd, 1960)

Current bibliography for aquatic sciences and fisheries - Food; Agriculture Organization of the United Nations. Fisheries Division. Biology Branch. (Taylor & Francis ltd, 1968)

Current bibliography for aquatic sciences and fisheries - Food; Agriculture Organization of the United Nations. Fisheries Division. Biology Branch. (Taylor & Francis ltd, 1971)

Current Northeast paleoethnobotany - New York State Museum. (University of the State of New York, State Education Dept, 1999)

Current Northeast paleoethnobotany - New York State Museum. (University of the State of New York, State Education Dept, 2008)

Cybele Britannica : or British Plants and their geographical relations - Watson, Hewett Cottrell, 1804 -1881 (1847)

The cyclopædia of India and of Eastern and Southern Asia : commercial, industrial and scientific, products of the mineral, vegetable, and animal kingdoms, useful arts and manufactures - Balfour, Edward, 1813 -1889 (B. Quaritch, 1885)

The cyclopædia; or, Universal dictionary of arts, sciences, and literature - Rees, Abraham, 1743 -1825 (Longman, Hurst, Rees, Orme & Brown [etc.], 1819)

Danmarks fiske - Krøyer, Henrik Nikolai, 1799 -1870 (Trykt i S. Triers officin, 1852)

Den danske planteverdens historie efter istiden : et kortfattet overblik - Warming, Eugenius, 1841 -1924 (Trykt i Universitetsbogtrykkeriet (J. H. Schultz), 1904)

Darwin and modern science : essays in commemoration of the centenary of the birth of Charles Darwin and of the fiftieth anniversary of the publication of the Origin of species - Darwin, Charles, 1809 -1882 (At the University Press, 1910)

Darwin and modern science; essays in commemoration of the centenary of the birth of Charles Darwin and of the fiftieth anniversary of the publication of the Origin of species - Seward, A. C. (Albert Charles), 1863 -1941 (University press, 1909)

Delectus opusculorum ad scientiam naturalem spectantium. Volumen primum - Ludwig, Christ. Frid. 1751 -1823 (Apud Siegfridum Lebrecht Crusium, 1790)

Denkschriften der Kaiserlichen Akademie der Wissenschaften / Mathematisch-Naturwissenschaftliche Classe - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (Aus der Kaiserlich-Königlichen Hof- und Staatsdruckerei, 1852)

Denkschriften der Kaiserlichen Akademie der Wissenschaften / Mathematisch-Naturwissenschaftliche Classe - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (Aus der Kaiserlich-Königlichen Hof- und Staatsdruckerei, 1907)

Dernières adjonctions à la flore fossile d'Aix-en-Provence : précédée de notions stratigraphiques et paléontologiques appliquées à l'étude du gisement des plantes fossiles d'Aix-en-Provence - Saporta, Gaston, marquis de, 1823 -1895 (G. Masson, 1889)