1. Agassi, M., ed. 1995.Soil Erosion, Conservation, and Rehabilitation, 397New York, Basel, Hong Kong: Marcel Dekker, Inc.
2. Alef, K. 1991.Methodenhandbuch Bodenmikrobiologie, ecomed, 284Landsberg / Lech.
3. Conservation tillage systems and their adoption in the United States
4. Boardman, J., Foster, I.D.L. and Dearing, J. A., eds. 1990.Soil erosion on Agricultural Land, 686Chichester, New York, Brisbane: John Wiley & Sons.