- Publication venue
- Publication date
- 01/01/1990
- Field of study
- Publication venue
- Publication date
- 01/01/1991
- Field of study
- Publication venue
- ORSTOM
- Publication date
- 01/01/1992
- Field of study
- Publication venue
- 'Walter de Gruyter GmbH'
- Publication date
- Field of study
- Publication venue
- ORSTOM
- Publication date
- 01/01/1992
- Field of study
- Publication venue
- MRT
- Publication date
- 01/01/1991
- Field of study
- Publication venue
- 'UNESCO Institute for Statistics'
- Publication date
- 01/01/2000
- Field of study
- Publication venue
- ORSTOM
- Publication date
- 01/01/1996
- Field of study