SUMATRAN ELEPHANT (Elephas maximus sumatranus Temminck) POPULATION IN THE NORTHEASTERN PART OF THE TESSO NILO NATIONAL PARK RIAU PROVINCE. Universitas Riau [Internet]. 2020 Oct. 23 [cited 2025 Aug. 2];4(2):1-6. Available from: https://jiik.ejournal.unri.ac.id/index.php/JIIK/article/view/96