L. G · Louis A. Girifalco · Louis G.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Universal Force: Gravity - Creator Of Worlds | 978-0-19-964213-7 (0-19-964213-3) | 2014 |
| The Universal Force: Gravity - Creator of Worlds | 978-0-19-922896-6 (0-19-922896-5) | 2007 |