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2. Bao YG, Liu ZF, Liu SF et al (2001) A centennial research on geology in Beijing. Geological Publishing House, Beijing (in Chinese)
3. Beijing Bureau of Geology and Mineral Resources (1991) Regional geology of Beijing. Geological Publishing House, Beijing (in Chinese)
4. Beijing Institute of Hydrogeology and Engineering Geology (1981a) Survey report on all springs in Gaozhuang, Mapao, Wanfotang and Yuquanshan in Bijing (in Chinese)
5. Beijing Institute of Hydrogeology and Engineering Geology (1981b) Hydrogeological survey report of bedrock water supply in Yuquanshan area in Beijing (in Chinese)