Bergen DW. —
Research Issues For The Improvement Of Farming Systems In Burundi (Text in French),
p. 75-80. vol. 12 no 2
- PDF text
1988
Bergen DW. —
Discussion paper 'Considerations on the orientation of agricultural research in developing countries' (Text in French),
p. 156-162. vol. 6 no 4
- PDF text
1984
Bergen DW. —
Regional specialization, a face behind the development of Burundi (Text in French),
p. 99-103. vol. 2 no 3
- PDF text