| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Flora and vegetation of the Wadden Sea | 978-90-6191-053-4 (90-6191-053-6) | 1979 | |
| Invertebrates of the Wadden Sea | 978-90-6191-054-1 (90-6191-054-4) | 1981 | N Dankers · H. Kuhl |
J. W. · J Wolff · W.J. · W. J. (edit). Wolff · W.W.