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Effects of sterilization on components in nutrient media : papers presented at a symposium, organized by the Department of horticulture, Agricultural university, Wageningen, the Netherlands, March 4, 1970 / ed. by J. van Bragt...[et al.].
- Veenman,
- 1971.
- Wageningen :
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The development cycle of some aquatic plants in the Netherlands / B.J. Hoogers and H.G. van der Weij.
- 841
- Instituut voor biologisch en scheikundig onderzoek van landbouwgewassen,
- 1971.
- Wageningen :
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Time-tables as a method to record changes in plankton composition / B.J. Hoogers and H.G. van der Weij.
- Instituut voor biologisch en scheikundig onderzoek van landbouwgewassen,
- 1971.
- Wageningen :
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Gypsiferous soils : notes on their characteristics and management / J.G. van Alphen, F. de los Rios Romero.
- International institute for land reclamation and improvement,
- 1971.
- Wageningen :
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A preliminary investigation into the social problems connected with a landreform project in Columbia : the Córdoba no. 1 project / H.J. Molenaar.
- Landbouwhogeschool. Afdeling sociologie van de niet-westerse gebieden,
- 1971.
- Wageningen :