HERRMANN, Klaus. Meilensteine der Landtechnik. agricultural engineering.eu, [S. l.], v. 52, n. 2, p. 104–105, 1997. DOI: 10.15150/lt.1997.2569. Disponível em: http://195.37.233.11/landtechnik/article/view/1997-52-2-104-105. Acesso em: 2 mai. 2024.