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Symposium on waste land control and reclamation, Jakarta, 27-29 okt. 1975 : voordrachten : The role of farmyard manure and green manures in soil fertility restoration in the humid tropics / by Th.J. Bredero. Reflections on the problem of upland farming on inferior soils in the humid tropics of S.E. Asia / J.P. Andriesse.
- 850.1
- Koninklijk instituut voor de tropen. Department of agricultural research,
- 1975.
- Amsterdam :