H. Köhler · J. H. · J.K · J. Köhler
Sportology Publications · Sportology Pubns
| title | ISBN-13 | year of publication |
|---|---|---|
| Science of Pocket Billiards | 978-0-9622890-0-2 | 1989 |
| Slingshot Shooting | 978-0-9765311-0-4 | 2005 |
| The Science of Pocket Billiards | 978-0-9622890-2-6 | 1995 |
| Upscale Nine-Ball | 978-0-9622890-7-1 | 2000 |
| Upscale One-Pocket | 978-0-9622890-3-3 | 1995 |