Arja, Awliya Rahmi, and . Supijatno. “Penyadapan Tanaman Karet (Hevea Brasiliensis Mull-Arg.) Di Perkebunan Karet Gurach Batu Estate, Asahan, Sumatera Utara”. Buletin Agrohorti, vol. 6, no. 1, Jan. 2018, pp. 1-9, https://doi.org/10.29244/agrob.v6i1.16817.