| title | creator | language | description | tableOfContents | contributor | subject | created |
| The Circular Study | Green, Anna Katharine, 1846-1935 | en | | | | | 2006-07-05 |
| Copyright Law of the United States of America and Related Laws Contained in Title 17 of the United States Code, Circular 92 | | en | | | | | 2003-07-01 |
| William Harvey and the Circulation of the Blood | Huxley, Thomas Henry, 1825-1895 | en | | | | Harvey, William, 1578-1657; Blood -- Circulation -- History | 2001-11-01 |
| The Circular Staircase | Rinehart, Mary Roberts, 1876-1958 | en | | | | Fiction; Detective and mystery stories | 1996-02-01 |
| The Trial of Reuben Crandall, M.D.
Charged with Publishing and Circulating Seditious and Incendiary Papers, &c. in the District of Columbia, with the Intent of Exciting Servile Insurrection. Carefully Reported, and Compiled from the Written Statement | Unknown | en | | | | Crandall, Reuben, 1805?-1838 -- Trials, litigation, etc.; American Anti-Slavery Society; Trials (Seditious libel) -- Washington (D.C.); Slavery -- Washington (D.C.) | 2009-02-26 |
| Theory of Circulation by Respiration
Synopsis of its Principles and History | Willard, Emma, 1787-1870 | en | | | | Blood -- Circulation; Respiration | 2006-08-15 |