| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The X Factor: What It Is & How to Find It: The Relationship Between Inherited Heart Size and Racing Performance | 978-0-929346-46-5 (0-929346-46-7) | 1997 |
| Understanding the Power of the X Factor: Patterns of Heart Score and Performance | 978-0-929346-68-7 (0-929346-68-8) | 2001 |
M. H. · Maren Heyne · Marianne Hamm · Marianne Henio · Marianne Henn · Marina Hahn · Marion Hahn · Marion Ham · Marion Hamm · Marion Hume · MaryAnna Ham · Maureen Honey · Miriam Hein · Miriam Heun · Miriam Höhne · Moreen Heine