Ares Gusti Nugraha, Muhammad Firdaus. Willingness to Pay and Factors Affecting the Income of Rice and Corn Farmers in the Use of Superior Seeds in North Raman Sub District: IPB University. JEKP [Internet]. 2022Dec.1 [cited 2024May1];11(2):161-74. Available from: https://jai.ipb.ac.id/index.php/jekp/article/view/32672