HUFF, E. B. The Design Respects of Engineers for Planning Agricultural Machines. Economica, [S. l.], v. 6, n. Különszám, p. 110–122, 2020. DOI: 10.47282/ECONOMICA/2013/6/Különszám/4465. Disponível em: https://ojs.lib.unideb.hu/economica/article/view/4465. Acesso em: 7 dec. 2021.