| Author: | Ballard, Robert |
| Subject: | DT, Pyramids |
| Format: | Text |
| Date issued: | 2012 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | The Solution of the Pyramid Problem; or, Pyramid Discoveries : With a New Theory as to their Ancient Use [electronic resource] / Robert Ballard |