| Autor | Częstotliwość |
| Dehn, Jan |
2 |
| Collier, Paul, 1949- 1949- |
1 |
| Dehn, Jan Verfasser |
1 |
| World Bank Development Research Group Office of the Director |
1 |
| World Bank Development Research Group Rural Development |
1 |
| World Bank Development Research Group Rural development |
1 |
