Takács, Péter, János Tamás, and Csaba Lénárd. “Virtual Soil Information Systems in the Bihar Subregion and at Tedej Corp”. Acta Agraria Debreceniensis, no. 13 (May 4, 2004): 186–189. Accessed May 1, 2024. https://ojs.lib.unideb.hu/actaagrar/article/view/3410.