EHLERT, Detlef. Ertragskartierung in selbstfahrenden Feldhäckslern. agricultural engineering.eu, [S. l.], v. 54, n. 2, p. 84–85, 1999. DOI: 10.15150/lt.1999.2297. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/1999-54-2-084-085. Acesso em: 4 mai. 2024.