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Proceedings of the Vetiver grass seminar at the International agricultural centre in Wageningen, The Netherlands on 26th January 1989 / [contrib. by Richard Grimshaw...et al.].
- Internationaal agrarisch centrum,
- 1989.
- Wageningen :
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International course on rural extension : objectives, concepts, programme / Henk van Dissel.
- Internationaal agrarisch centrum,
- 1983.
- Wageningen :