P R · Peter R. · Peter W Ruff · Peter Wolfgang Ruff
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Emil du Bois Reymond | 978-3-322-00573-1 (3-322-00573-9) | 1981 | ||
| Managing Communications in a Crisis | 978-0-566-08294-8 (0-566-08294-2) | 2004 | Khalid Aziz | |
| Olivia Newton-John | 978-0-8256-3934-0 (0-8256-3934-4) | 1979 | ||
Gabler Verlag · Gower Publishing Ltd · Music Sales