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Agricultural sciences and the world food supply : an international symposium, organized by the Agricultural university Wageningen, the Netherlands, on the occasion of its golden jubilee, 4-6 March 1968 / [contrib. E. de Vries...et al.].
- Veenman,
- 1968.
- Wageningen :
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Irrigation requirements for double cropping of lowland rice in Malaysia / G.A.W. van de Goor, G. Zijlstra.
- 855.6
- Veenman,
- 1968.
- Wageningen :