Pfeiffer, R. (1990). Sustainable agriculture in practice: The production potential and the environmental effects of macro-contourlines in the West Usambara Mountains of Tanzania.
Chicago-Zitierstil (17. Ausg.)Pfeiffer, Reinhard. Sustainable Agriculture in Practice: The Production Potential and the Environmental Effects of Macro-contourlines in the West Usambara Mountains of Tanzania. 1990.
MLA-Zitierstil (9. Ausg.)Pfeiffer, Reinhard. Sustainable Agriculture in Practice: The Production Potential and the Environmental Effects of Macro-contourlines in the West Usambara Mountains of Tanzania. 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.