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Ethnoveterinary medicine : a practical approach to the treatment of cattle diseases in sub-Saharan Africa / Ngeh J. Toyang...[et al. ; ill. Barbera Oranje].
- Agromisa foundation [etc.],
- 2007.
- Wageningen :
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Snail farming : production, processing and marketing / J.R. Cobbinah, Adri Vink, Ben Onwuka ; [ill. Barbera Oranje].
- Agromisa foundation [etc.],
- 2008.
- Wageningen :