Mijiarto, Joko, Sambas Basuni, and Tutut Sunarminto. “NILAI EKONOMI JASA LINGKUNGAN KAWASAN KARST GUA GUDAWANG”. Media Konservasi 19, no. 3 (January 11, 2016). Accessed December 9, 2022. https://journal.ipb.ac.id/index.php/konservasi/article/view/10901.