PARTICIPATIVE MAINTENANCE OF UPSTREAM PUSUR SUB WATERSHED AREA THROUGH CONSERVATION FIELD SCHOOL IN MRIYAN VILLAGE MUSUK SUB DISTRICT BOYOLALI REGENCY. Isjoust [Internet]. 2019 Apr. 4 [cited 2026 Jul. 19];1(2):98-111. Available from: https://e-journal.uingusdur.ac.id/isjoust/article/view/11920