1. The cost of soil erosion in Nicaragua;Alfsen;Ecological Economics,1996
2. Predicting soil losses due to rill and sheet erosion;Arnoldus,1977
3. Plant nutrient losses from soils by water erosion;Barrows;Advances in Agronomy,1963
4. Evaluación de la Escorrentia Superficial y la Erosión en un Pastizal con Arboles Aislados en la Suiza, Turrialba, Costa Rica;Berru,1980