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2
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The role of draught animal technology in rural development : proceedings of the international seminar held at Edinburgh, Scotland, 2-12 April 1990 / ed. G. den Hertog & J.A. van Huis.
- Pudoc,
- 1992.
- Wageningen :
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Analysis and evaluation of pumping test data / G.P. Kruseman, N.A. de Ridder ; with ass. from J.M. Verweij.
- International institute for land reclamation and improvement (ILRI),
- 1992.
- Wageningen :