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2
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Soil survey interpretation : an annotated bibliography : selected references 1960-1972 / comp. by Ronald H. Brook.
- International institute for land reclamation and improvement (ILRI),
- 1975.
- Wageningen :
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Land and water development : selected literature 1974 / prep. by the Library of the Staring building Wageningen.
- International institute for land reclamation and improvement (ILRI),
- 1975.
- Wageningen :