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Foraging behaviour of the egg parasitoid Uscana lariophaga : towards biological control of bruchid pests in stored cowpea in West Africa / Frans van Alebeek.
- s.n.],
- 1996.
- [S.l. :
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Soil knowledge for farmers, farmer knowledge for soil scientists : the case of acid sulphate soils in the Mekong delta, Viet Nam / M.E.F. van Mensvoort.
- s.n.],
- 1996.
- [S.l. :