| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Organisation of regional passenger transport: Report of the thirty-fifth Round Table on Transport Economics held in Paris on 28th and 29th October 1976 | 978-92-821-1O42-3 (92-821-1O42-7) | 1977 |
A. R. · Andrea Rühl · Andreas Rühl · Anna Rühl · Anna Sarah Rühl · Ariane Rühl · Dr Martin A. Ruehl · Martin A. Ruehl