J.B. · J. Butler · J.M. · M. Butler
| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Fit & Pregnant: The Pregnant Woman's Guide To Exercise | 978-0-937921-55-5 (0-937921-55-6) | 1996 |
| Fit and Pregnant: The Pregnant Woman's Guide To Exercise | 978-0-941950-40-4 (0-941950-40-9) | 2006 |