R. S. · R. Vaughn · Raintree Steck-Vaughn Publishers · Steck-Vaughn
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Ged Language Arts, Reading Exercise Book | 978-0-7398-3604-0 (0-7398-3604-8) | 2001 |
| Ged Science Exercise Workbook | 978-0-7398-3602-6 (0-7398-3602-1) | 2001 |
| Interactive Science Encyclopedia: Macintosh Version | 978-0-8172-3913-8 (0-8172-3913-8) | 1997 |