| Author: | Pickering, Edward C. (Edward Charles), 1846-1919 |
| Subject: | QB, Variable stars |
| Format: | Text |
| Date issued: | 2011 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | A Plan for Securing Observations of the Variable Stars [electronic resource] / Edward C. Pickering |