This document contains a history of this page, from the current version to the earliest one available.
| Version | Name | User | Date | Time | |
| current | Cottle Chapter 6 - Envelopes, Reciprocals | spc2-brig2-5-0-cust108.asfd.broadband.ntl.com | 12 November 2004 | 5:36 pm | |
| Cottle Chapter 6 | ip68-227-199-161.dc.dc.cox.net | 6 April 2004 | 2:26 pm | ||
| Cottle Chapter 6 | ip68-227-199-161.dc.dc.cox.net | 6 April 2004 | 2:25 pm | ||
| Cottle Chapter 6 | ip68-227-199-161.dc.dc.cox.net | 6 April 2004 | 2:20 pm | ||
| Cottle Chapter 6 | ip68-227-199-161.dc.dc.cox.net | 6 April 2004 | 4:54 am | ||
| Cottle Chapter 6 | ip68-227-199-161.dc.dc.cox.net | 6 April 2004 | 4:54 am | ||
| Cottle Chapter 6 | ip68-227-199-161.dc.dc.cox.net | 6 April 2004 | 4:53 am | ||