| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Social and labour aspects of urban passenger transport in selected African cities | 978-92-2-107203-4 (92-2-107203-7) | 1989 |
| Social and labour consequences of economic and technological change in civil aviation | 978-92-2-107031-3 (92-2-107031-X) | 1989 |