C. Hart Merriam papers : including correspondence, papers relating to career with the United States Biological Survey - Merriam, C. Hart (Clinton Hart), 1855 -1942 (1886)

The Cambridge natural history - Harmer, S. F. (Sidney Frederic), 1862 -1950 (Macmillan and co., limited, 1899)

The Cambridge natural history - Harmer, S. F. (Sidney Frederic), 1862 -1950 (Macmillan and co., limited, 1900)

Camps in the Caribbees; the adventures of a naturalist in the Lesser Antilles - Ober, Frederick A. (Frederick Albion), 1849 -1913 (Lothrop, Lee & Shepard, 1907)

Camps in the Caribbees: the adventures of a naturalist in the Lesser Antilles - Ober, Frederick A. (Frederick Albion), 1849 -1913 (D. Douglas, 1880)

Camps in the Caribbees : the adventures of a naturalist in the Lesser Antilles - Lawrence, George N. (George Newbold), 1806 -1895 (Lee and Shepard, 1899)

Camps in the Caribbees: the adventures of a naturalist in the Lesser Antilles - Ober, Frederick A. (Frederick Albion), 1849 -1913 (Lee and Shepard, 1880)

The Canadian bird book : illustrating in natural colors more than seven hundred north American birds, also several hundred photographs of their nests and eggs - Reed, Chester A. (Chester Albert), 1876 -1912 (Musson Book Co, 1914)

The Canadian bird book illustrating in natural colors more than seven hundred North American birds : also several hundred photographs of their nest and eggs - Reed, Chester A. (Chester Albert), 1876 -1912 (Musson, 1914)

The Canadian field-naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 2003)

The Canadian field-naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 2009)

The Canadian field-naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 2010)

The Canadian naturalist and geologist - Natural History Society of Montreal. (B. Dawson, 1857)

Capital natural de México - Sarukhan, Jose (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2009)

The Caribbean forester - Burke, Lauretta Marie (Tropical Forest Experiment Station, United States Forest Service, 1939)

Carnegie Institution of Washington publication - Carnegie Institution of Washington (Carnegie Institution of Washington, 1919)