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4
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Outlines of perennial crop breeding in the tropics / ed. by F.P. Ferwerda and F. Wit.
- Veenman,
- 1969.
- Wageningen :
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3me Symposium sur les nouveaux herbicides = 3rd Symposium on new herbicides = 3. Symposium über neue Herbizide : 9-10 décembre 1969, Versailles / [Contr. de R.K. Pfeiffer...et al.].
- Pudoc,
- 1969.
- Wageningen :
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The economic transformation of family rice-farming in Surinam / H.A. Luning.
- Centre for agricultural publishing and documentation (PUDOC),
- 1969.
- Wageningen :
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Sound absoprtion at the soil surface / Anthony R.P. Janse.
- Centre for agricultural publishing and documentation,
- 1969.
- Wageningen :