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Some aspects of research in tropical countries : paper presented at the conference on tropical agriculture at Wageningen university on 22nd and 23rd November, 1960 / by S. de Blank.
- [s.n.],
- 1960.
- Wageningen :
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International summer seminar on problems and methods of technical assistance in community development, Wageningen, Holland, 13-24 July 1952
- [s.n.],
- 1953.
- Wageningen :
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"New" seed in "old" China : impact of CIMMYT collaborative programme on maize breeding in South-Western China / Yiching Song.
- [s.n.],
- 1998.
- Wageningen :