Steps in the conversion and development of organic farms : Proceeding of the Second ENOF Workshop, Barcelona, 3-4 October 1996 The European Network for Scientific Research Coordination in Organic Farming ; edited by J. Isart & J.J. Llerena - Barcelona J. Isart & J.J. Llerena D.L. 1997 - 129 p. 30 cm

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