| title | media type | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|---|
| The Hardness Factor CD: How to Achieve Your Best Health and Sexual Fitness at Any Age | Audio CD | 978-0-06-076009-0 | 2005 | |
| The Hardness Factor : How to Achieve Your Best Health and Sexual Fitness at Any Age | Paperback | 978-0-06-123520-7 | 2007 | Gerald Secor Couzens |
| The Hardness Factor: How to Achieve Your Best Health and Sexual Fitness at Any Age | " | 978-0-00-721928-5 | 2005 | |
| The Hardness Factor: How to Achieve Your Best Health and Sexual Fitness at Any Age | Hardcover | 978-0-06-075551-5 | 2005 | Gerald Secor Couzens |
D S · Dr. S. · S. L. · Steven L. · Steven Lamm