Catalogue of the flowering plants and gymnosperms of Peru = Catálogo de las angiospermas y gimnospermas del Perú - Brako, Lois, 1950 - (Missouri Botanical Garden, 1993)

Catalogue of the library of the Arnold Arboretum of Harvard University - Sargent, Charles Sprague, 1841 -1927 (Printed at the Cosmos Press, 1914)

Catalogue of the library of the Royal Botanic Gardens, Kew - Royal Botanic Gardens, Kew. (HMSO, 1899)

Catalogue of the plants of the state of Illinois - Lapham, Increase Allen, 1811 -1875 (s.n, 1800)

Catalogue of the vascular plants of Ecuador = Catálogo de las plantas vasculares del Ecuador - González, Amada Pedroni. (Missouri Botanical Garden Press, 1999)

Catalogus seminum in Horto Botanico Universitatis Valentinæ anno ... collectorum - Universidad de Valencia. Jardin Botanico. (Hijo F. Vives Mora, 1925)

Catalogus seminum in Horto Botanico Universitatis Valentinæ anno ... collectorum - Universidad de Valencia. Jardin Botanico. (Hijo F. Vives Mora, 1926)

A Catskill flora and economic botany - Brooks, Karl L. (University of the State of New York, State Education Dept, 1983)

C.C. Parry and John Torrey correspondence, 1846-1868 - Parry, C. C. (Charles Christopher), 1823 -1890

The Century dictionary : an encyclopedic lexicon of the English language: prepared under the superintendence of William Dwight Whitney - Whitney, William Dwight, 1827 -1894 (Century Co, 1889)

A century of progress in the natural sciences, 1853-1953 - California Academy of Sciences (1955)

Certain aspects of the metabolism of some quinolizidane alkaloids by Lupinus luteus var. Romulus - Graham, Donald M. (Dept. of Biochemistry, University of Alberta, 1965)

Chamber's encyclopaedia, a dictionary of universal knowledge (Chambers, 1902)

Chapters in the prehistory of eastern Arizona I - Martin, Paul S. (Paul Sidney), 1899 -1974 (Chicago Natural History Museum, 1962)

Charles Wilkins Short and John Torrey correspondence, 1834-1859 - Short, Charles Wilkins, 1794 -1863 (1859)

Charles Wright and John Torrey correspondence, 1849-1869 - Wright, Charles, 1811 -1885 (1851)

Charles Wright and John Torrey correspondence, 1849-1869 - Wright, Charles, 1811 -1885 (1850)

Check-list of the species of fishes known from the Philippine Archipelago - Jordan, David Starr, 1851 -1931 (Bureau of printing, 1918)

Check-list of the species of fishes known from the Philippine Archipelago - Jordan, David Starr, 1851 -1931 (Bureau of printing, 1910)

A check list of the vascular plants of Nicaragua : based largely on collections in Nicaragua made by the author and companions, 1968-1976 - Seymour, Frank Conkling. (H.N. Moldenke and A.L. Moldenke, 1980)

Checklist of CITES Species (1998)

Checklist of CITES Species and Annotated CITES Appendices and Reservations - Inskipp, Tim (CITES Secretariat, UNEP-WCMC, 2005)