?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Billmann%2C+Bettina&rft.aulast=Billmann&rft.aufirst=Bettina&rft.date=2005&rft.title=Production+of+Organic+Ornamentals+in+Germany+%C3%A2%C2%80%C2%93+a+Status+Quo+Analysis+of+the+Industry+&rft.genre=proceeding