(1986). The importance of biological agriculture in a world of diminishing resources: Proceedings of the 5th IFOAM international scientific conference at the University of Kassel (Germany), August 27 - 30, 1984. Verl.-Gruppe Witzenhausen.
Chicago-Zitierstil (17. Ausg.)The Importance of Biological Agriculture in a World of Diminishing Resources: Proceedings of the 5th IFOAM International Scientific Conference at the University of Kassel (Germany), August 27 - 30, 1984. Witzenhausen: Verl.-Gruppe Witzenhausen, 1986.
MLA-Zitierstil (9. Ausg.)The Importance of Biological Agriculture in a World of Diminishing Resources: Proceedings of the 5th IFOAM International Scientific Conference at the University of Kassel (Germany), August 27 - 30, 1984. Verl.-Gruppe Witzenhausen, 1986.