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Simulation of growth of managed forests in the Atlantic zone of Costa Rica and analysis of nutrient cycling to determine surpluses and shortages / R.L.H. Poels.
- Agricultural university. Department of soil science and geology,
- 1994.
- Wageningen :
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Soil formation by termites : a study in the Kisii area, Kenya / W.G. Wielemaker.
- 864.5
- Agricultural university. Department of soil science and geology,
- 1984.
- Wageningen :