Authors: C
- Clodd, Edward 1840-1930
- Clodius, C. A. H. (Christian August Heinrich) 1772-1836
- Cloke, Harold E. (Harold Edward) 1873-1949
- Clontz, J. (Jerry) -
- Clontz, T. E. (Timothy E.) 1964-
- Clopper, Edward Nicholas 1879-1953
- Closser, Myla Jo 1880-1962
- Clothier, Bill 1921-2015
- Clouard, Maurice 1857-1902
- Cloud, D. C. -
- Clough, A. H., Mrs. 1828-1904
- Clough, Arthur Hugh 1819-1861
- Clough, Ethlyn T. 1858-1936
- Clouston, J. Storer (Joseph Storer) 1870-1944
- Clouston, W. A. (William Alexander) 1843-1896
- Clowes, W. Laird (William Laird), Sir 1856-1905
- Cluff, Warren Y. -
- Clute, Willard Nelson 1869-1950
- Cluthe Rupture Institute -
- Clutterbuck, Walter J. 1853-1937
- Clutter, Mark -
- Clutton-Brock, A. (Arthur) 1868-1924
- Clutton, John 1759-1838
- Clymer, J. F. (John F.) 1840-1903
- Clyne, Ronald 1925-2006
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