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1 Efd, S.; van Rheenen, T. (Comp.) 1993. Quantified farming systems analysis: Frequently used definitions. INRES Project, Wageningen Agricultural University. 8p.
(Location: IWMI-HQ Call no: P 2956 Record No: H013636)
(Location: IWMI-HQ Call no: P 2957 Record No: H013637)
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