N.G. · R.N. · Robert G. · Robert N.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Running for lifelong fitness: A scientific and personal guide | 978-0-13-783937-7 (0-13-783937-5) | 1988 |
| Running for Lifelong Fitness: A Scientific and Personal Guide | 978-0-13-783945-2 (0-13-783945-6) | 1987 |