García-Garizábal, I., Causapé Valenzuela, J. and Abrahão, R. 2009. Evolution of the efficiency and agro-environmental impact of a traditional irrigation land in the middle Ebro Valley (2001-2007). Spanish Journal of Agricultural Research. 7, 2 (Jun. 2009), 465-473. DOI:https://doi.org/10.5424/sjar/2009072-1499.