The potential of organic farming for biodiversity : proceedings of a joint workshop organised by the German Federal Agency for Nature Conservation (BfN), the International Federation of Organic Agricultural Movements (IFOAM) and IUCN - The World Conservation Union, Warsaw, Poland, 3-4 March 2002 / editors, Sue Stolton ... [et al.].
The potential of organic farming for biodiversity : proceedings of a joint workshop organised by the German Federal Agency for Nature Conservation (BfN), the International Federation of Organic Agricultural Movements (IFOAM) and IUCN - The World Conservation Union, Warsaw, Poland, 3-4 March 2002 / editors, Sue Stolton ... [et al.].