| Author's List |
| title | creator | language | description | tableOfContents | contributor | subject | created |
| Among the Forces | Warren, Henry White, 1831-1912 | en | 2005-05-09 | ||||
| Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work | Warren, Henry White, 1831-1912 | en | 2005-04-14 |