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2
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Crop networks : searching for new concepts for collaborative genetic resources management / ed. by Th.J.L. van Hintum, L. Frese and P.M. Perret.
- IBPGR,
- 1991.
- Rome :
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Agro- Ecological Land Resources Assessment For Agricultural Development Planning : A Case Study of Kenya Resources Data Base And Land Productivity / A.H. Kassam, H.T. van Velthuizen , P.H. Sloane , G.W. Fischer and M.M. Shah.
- FAO,
- 1991.
- Rome :