WEISSBACH, Michael. Flächenbonitur mit dem Horizontalpenetrometer. agricultural engineering.eu, [S. l.], v. 53, n. 2, p. 68–69, 1998. DOI: 10.15150/lt.1998.2429. Disponível em: http://195.37.233.21/landtechnik/article/view/1998-53-2-068-069. Acesso em: 16 nov. 2024.