?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Huelsbergen%2C+Kurt-Juergen&rft.aulast=Huelsbergen&rft.aufirst=Kurt-Juergen&rft.date=2005&rft.title=Development+of+an+Environmental+Management+System+for+Organic+Farms+and+its+Introduction+into+Practice&rft.genre=proceeding