R. S. · Richard S. · Richard Schönborn
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Competitive Tennis for Young Players | 978-1-84126-075-4 (1-84126-075-4) | 2002 | Manfred Grosser |
| Speed Training in Tennis: Improve Your Performance Around the Court | 978-1-84126-030-3 (1-84126-030-4) | 2000 | Manfred Grosser · Heinz Kraft |