| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Occupational and Qualification Structures in the Field of Environmental Protection in the Metal and Chemical Industries: Study on the Federal Republic of Germany | 978-92-826-2O15-1 (92-826-2O15-8) | 1991 | Christoph Nitschke · Ulrich Schumann |