| Author's List |
| title | creator | language | description | tableOfContents | contributor | subject | created |
| The Egyptian Conception of Immortality | Reisner, George Andrew, 1867-1942 | en | 2004-05-01 | ||||
| The Machinery of the Universe Mechanical Conceptions of Physical Phenomena | Dolbear, A. E. (Amos Emerson), 1837-1910 | en | 2009-07-18 | ||||
| Essays on the Materialistic Conception of History | Labriola, Antonio, 1843-1904 | en | Kerr, Charles H. [Translator] | 2010-06-01 | |||
| Conception Control and Its Effects on the Individual and the Nation | Barrett, Florence E. | en | 2004-10-31 |