VÁNTUS, A. Labour Efficiency of Dairy Farms with Different Types and Sizes in Hajdú-Bihar County. Acta Agraria Debreceniensis, [S. l.], n. 19, p. 62–67, 2006. DOI: 10.34101/actaagrar/19/3149. Disponível em: https://ojs.lib.unideb.hu/actaagrar/article/view/3149. Acesso em: 17 may. 2021.