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2
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Micro- and macronutrient distributions in Ethiopian Vertisol landscapes / Fisseha Itanna.
- Universität Hohenheim,
- 1992.
- Stuttgart :
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Socio-cultural and economic determinants of livestock holding - the role of financial markets and land tenure systems in reducing degradation caused by livestock in sub-Saharan Africa / Gerold Bödeker and Franz Heidhues.
- Universität Hohenheim,
- 1993.
- Stuttgart :