R.K. · Robert K. · Robert Kowalczyk, Kamil Niedzialomski Cezary Obczynski
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Calki Metody rozwiazywania zadan | 978-83-01-16984-8 (83-01-16984-2) | 2019 | Kamil Niedzialomski · Cezary Obczynski |
| Morning Calm: A Journey Through the Korean Countryside | 978-0-933704-20-6 (0-933704-20-8) | 1981 | |