Kurnianto, Fahmi Arif, et al. “LEVEL OF KNOWLEDGE OF SENIOR HIGH SCHOOL STUDENTS TO NORTH COASTAL OF JAVA CONSERVATION: Fahmi Arif Kurnianto, Bejo Apriyanto , Elan Artono Nurdin , Fahrudi Ahwan Ikhsan”. Geosfera Indonesia, vol. 1, no. 1, Dec. 2017, pp. 22-28, doi:10.19184/geosi.v1i1.6192.