Gebremedhin, B., Swinton, S., & Tilahun, Y. (1999). Effects of stone terraces on crop yields and farm profitability: Results of on-farm research in Tigray, northern Ethiopia.
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Cita Chicago Style (17a ed.)
Gebremedhin, Berhanu, S.M Swinton, y Y. Tilahun. Effects of Stone Terraces on Crop Yields and Farm Profitability: Results of On-farm Research in Tigray, Northern Ethiopia. 1999.
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Cita MLA (9a ed.)
Gebremedhin, Berhanu, et al. Effects of Stone Terraces on Crop Yields and Farm Profitability: Results of On-farm Research in Tigray, Northern Ethiopia. 1999.
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