Nagy, János, Gergely Harsányi, Orsolya Jánosy, Endre Harsányi, and Orsolya Nagy. 2014. “The Effects of Education, Culture, Research and Development in Hajdú-Bihar County”. Acta Agraria Debreceniensis, no. 61 (September):87-90. https://doi.org/10.34101/actaagrar/61/2048.