| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Economic criteria for the maintenance, modification, or creation of public urban and suburban transport services (which may not necessarily be ... held in Paris on 22nd and 23rd November, 1973 | 978-92-821-1026-3 (92-821-1026-5) | 1974 |
| Influence of measures designed to restrict the use of certain transport modes | 978-92-821-1055-3 (92-821-1055-9) | 1979 |