Syaukat, Yusman, and Anggara Ajeng Nilam Siwi. 2013. “Estimasi Nilai Ekonomi Air Irigasi Pada Usaha Tani Padi Sawah Di Daerah Irigasi Van Der Wijce, Kabupaten Sleman, Yogyakarta”. Jurnal Ilmu Pertanian Indonesia 14 (3): 202-10. https://journal.ipb.ac.id/JIPI/article/view/%20Demand%20for%20rice%20increases%20with%20population%20and%20over%20time.%20Howev.