Sulyok D, Rátonyi T. The Role of the 4M-ECO Agrieconomical Modell in the Crop Cultivation. Acta agrar. Debr. [Internet]. 2004 May 4 [cited 2024 Nov. 25];(13):170-3. Available from: https://ojs.lib.unideb.hu/actaagrar/article/view/3406