APA

Hailu Z., Runge-Metzger A., . (1993). Sustainability of Land Use Systems : The Potential of Indigenous Measures for the Maintenance of Soil Productivity in Sub-Sahara African Agriculture, A Review of Methodologies and Research Results/ (Acc: 1808). Weikersheim, Germany: Verlag Josef Margraf Scientific Books.

Chicago

Hailu Zegeye, Runge-Metzger Artur, . 1993. Sustainability of Land Use Systems : The Potential of Indigenous Measures for the Maintenance of Soil Productivity in Sub-Sahara African Agriculture, A Review of Methodologies and Research Results/ (Acc: 1808). Weikersheim, Germany: Verlag Josef Margraf Scientific Books.

Harvard

Hailu Z., Runge-Metzger A., . (1993). Sustainability of Land Use Systems : The Potential of Indigenous Measures for the Maintenance of Soil Productivity in Sub-Sahara African Agriculture, A Review of Methodologies and Research Results/ (Acc: 1808). Weikersheim, Germany: Verlag Josef Margraf Scientific Books.

MLA

Hailu Zegeye, Runge-Metzger Artur, . Sustainability of Land Use Systems : The Potential of Indigenous Measures for the Maintenance of Soil Productivity in Sub-Sahara African Agriculture, A Review of Methodologies and Research Results/ (Acc: 1808). Weikersheim, Germany: Verlag Josef Margraf Scientific Books. 1993.