Organization for Economic · Road Editions
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Around Greece in 80 Stays | 978-960-8189-72-0 (960-8189-72-1) | 2006 | |
| Environmental Education: An Approach to Sustainable Development, October 1992/L'Education Environnementale: Approches Pour UN Developpement Durable | 978-92-64-13771-4 (92-64-13771-8) | 1993 | Hartmut Schneider |