Erniwati, Erniwati. “Studi Dinamika Kualitas Air Daerah Aliran Sungai Batang Arau Di Propinsi Sumatera Barat”. Dampak, vol. 15, no. 1, Jan. 2018, pp. 37-42, doi:10.25077/dampak.15.1.37-42.2018.