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Soil ripening and soil classification : initial soil formation of alluvial desposits with a classification of the resulting soils / L.J. Pons, I.S. Zonneveld.
- Veenman,
- 1965.
- Wageningen :
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The Managil South-Western extension : an extension to the Gezira scheme : an example of an irrigation development project in the Republic of the Sudan / D.J. Shaw.
- 864.1
- Veenman,
- 1965.
- Wageningen :
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Some nomographs for the calculation of drain spacings / W.F.J. van Beers.
- Veenman,
- 1965.
- Wageningen :