Backman Seeds · S. B · Seeds and Backman
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Iac Mt Ast Fndtns Astrnmy | 978-1-305-27657-4 (1-305-27657-4) | 2014 |
| Intl Iac Mt Fndtns Astrnmy | 978-1-305-47722-3 (1-305-47722-7) | 2014 |
| Powerlecture Astro 4ltr | 978-0-538-73967-2 (0-538-73967-3) | 2010 |