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1Research structure in biological farming: general view, justification, development Research structure in biological farming: general view, justification, developmentby Vogtmann, H. (Kassel Univ., Witzenhausen (Germany). Div. of Alternative Agricultural Methods), FAO, Rome (Italy). Regional Office for Europe eng, Besson, J.-M. (ed.), Station Federale de Recherches en Chimie Agricole et sur l'Hygiene de l'Environnement, Liebefeld (Switzerland) fre
Published 1990Texto bibliotecaFAO IT