Siagian N, Siregar THS. PERTUMBUHAN DAN PRODUKTIVITAS AWAL TANAMAN KARET BERBATANG BAWAH BANYAK. JPK [Internet]. 2012Jun.1 [cited 2024Jul.3];32(1):10-2. Available from: https://ejournal.puslitkaret.co.id/index.php/jpk/article/view/145