Guo, Fang, Daoxian Yuan, and Zhengjiao Qin. “Groundwater Contamination in Karst Areas of Southwestern China and Recommended Countermeasures”. Acta Carsologica 39, no. 2 (June 1, 2010). Accessed November 23, 2024. https://ojs.zrc-sazu.si/carsologica/article/view/107.