| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Jurgensen Dynasty: Four Centuries of Watchmaking in two Countries | 978-87-87O36-88-7 (87-87O36-88-6) | 2013 |
J.K · J. Knudsen · J.M. · J. M. Knudsen · J R · John K · John M. · John R. · John R. Knudsen · M. K. · m r · R.K.