Siregar, A. Z. . “TABELA AND FISH FARMING ARE LOCAL WISDOMS ETHNIC SUMATERA FOR SUPPORTED ON SUSTAINABLE AGRICULTURE IN NORTH SUMATERA, INDONESIA”. Jurnal Online PERTANIAN TROPIK, vol. 4, no. 2, Aug. 2017, pp. 140-8, doi:10.32734/jpt.v4i2.3080.