| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Green Volunteers: World Guide to Voluntary Work in Nature Conservation | 978-88-900167-1-4 (88-900167-1-X) | 1998 | Fabio Ausenda · Elena Gatti |
Barbara Paul · Barbara Pauli · Barbara Paull · Barbara Pöll · Barbara Poole · Barbara Powell