B. Walker · Bill W. · Bill Walker · William O. Walker
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| RedShift™ College Edition Astronomy Workbook | 978-0-534-49031-7 | 2004 | |
| Redshift Astronomy Workbook | 978-0-03-024573-2 | 1998 | |
| Redshift College Edition | 978-0-03-026994-3 | 2002 | Saunders College Publishing |
| RedShift College Edition CD-ROM with RedShift College Edition Workbook | 978-0-03-029151-7 | 2000 | |
| The Redshift Astronomy Workbook | 978-0-03-023301-2 | 1999 | |