Atifah, Yusni, Violita Violita, Afifatul Achyar, Irma Putri, and Ganda Selaras. 2021. “Training Simple Analysis For Lake Water Pollution For The Nagari Community Of Kampung Batu Dalam Solok District, West Sumatra”. Pelita Eksakta 4 (2), 148-53. https://doi.org/10.24036/pelitaeksakta/vol4-iss2/158.