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2
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Desertification : exploding the myth / David S.G. Thomas and Nicholas J. Middleton.
- Wiley,
- 1994.
- Chichester [etc.] :
-
The biological management of tropical soil fertility / ed. by P.L. Woomer and M.J. Swift.
- Wiley,
- 1994.
- Chichester [etc.] :