| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Background Information on Invertebrates of the Habitats Directive and the Bern Convention (Nature and Environment: 80) | 978-92-871-3062-4 (92-871-3062-0) | 1997 | P.J. van Helsdingen · M.C.D. Speight |
| Background Information on Invertebrates of the Habitats Directive and the Bern Convention (Nature and Environment: 81) | 978-92-871-3064-8 (92-871-3064-7) | 1996 | P.J. van Helsdingen · M.C.D. Speight |
| Background Information on Invertebrates of the Habitats Directive and the Bern Convention (Nature and Environment) | 978-92-871-3060-0 (92-871-3060-4) | 1996 | P.J. van Helsdingen · M.C.D. Speight |