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Indicator plants for sustainability assessment in Andean agro-ecosystems / Barbara Becker.
- Margraf,
- cop. 2001.
- Weikersheim :
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People's participation in natural resource management : experiences from watershed management projects in India / Barbara Adolph.
- Margraf,
- cop. 1999.
- Weikersheim :
-
Wind erosion in West Africa : the problem and its control : proceedings of the international symposium, University of Hohenheim, Germany, 5-7 December 1994 / ed. Barbara Buerkert, Bruce E. Allison, Matthias von Oppen.
- Margraf,
- cop. 1996.
- Weikersheim :
-
El Fomento de cultivos no-tradicionales de exportacioń : una estrategia viable para Baja Verapaz? / Bárbara Massler.
- Margraf,
- 1992.
- Berlin :