| title | ISBN-13 | year of publication |
|---|---|---|
| Nomads and farmers: Incomes and poverty in rural somalia | 978-92-2-102893-2 | 1981 |
| Rural-urban gap and inequality in Kenya | 978-92-2-102895-6 | 1981 |
| Rural-urban gap and inequality in Nigeria | 978-92-2-102894-9 | 1981 |
| Rural-urban gap in Tanzania | 978-92-2-102896-3 | 1981 |