| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Occupational and qualification structures in the field of environmental protection in the metal and chemical industries: Study on the Federal Republic of Germany | 978-92-826-2015-1 (92-826-2015-8) | 1991 |
| Occupational profiles and employment structures in environmental protection in the metal and chemical industries: Summary report | 978-92-826-4113-2 (92-826-4113-9) | 1992 |