WILD, Karl; SCHURIG, Manfred; RÖDEL, Gerhard. Bodenbeprobung. agricultural-engineering.eu, [S. l.], v. 52, n. 3, p. 122–123, 1997. DOI: 10.15150/lt.1997.2536. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/1997-52-3-122-123. Acesso em: 28 märz. 2024.