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A conceptual model for analysing input-output coefficients in arable farming systems: from diagnosis towards design
de Koeijer, T. J., (1999)
Assessment of the quality of farmers' environmental management and its effects on resource use efficiency: a Dutch case study
de Koeijer, T. J., (2003)
Damage control inputs : a comparison of conventional and organic farming systems
Guan, Zhengfei, (2005)