| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Alcantarillado, gas y electricidad | 978-84-7888-893-1 (84-7888-893-4) | 2004 |
| Oog om oog / druk 1 | 978-90-254-2365-0 (90-254-2365-5) | 2007 |
Frank M. Ruff · m r · Margarethe Ruff · Mark Edward Ruff · Mary Ann Ruff · Matt Ruff · Melvyn Ruff · Michael Ruff · Mr Melvyn Ruff · Ms. Becky Ruff. · Ronald M. Ruff