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Soil organic matter dynamics and sustainability of tropical agriculture : proceedings of an international symposium ... held in Leuven, Belgium, 4-6 November 1991 / ed. by K. Mulongoy and R. Merckx.
- Wiley,
- 1991.
- Chichester [etc.] :
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Biogeochemistry of major world rivers / ed. by Egon T. Degens, Stephan Kempe and Jeffrey E. Richey.
- Wiley,
- 1991.
- Chichester [etc.] :