@book{StrassnerNeuendorff2011, author = {C Strassner and J. Neuendorff}, title = {Easy Steps To Organic Certification. The updated manual for canteens, restaurants and foodservice operators.}, edition = {2. vollst{\"a}ndig {\"u}bera}, editor = {R. Roehl}, isbn = {978-3-9813008-1-9}, year = {2011}, }