Guo Hong, Han Rubin, Huang Huaiwu, Lan Riyong, and Xie Riwan Types of Weathering of the Huashan Rock Paintings, in: Agnew, Neville, ed., Conservation of Ancient Sites on the Silk Road: Proceedings of the Second International Conference on the Conservation of Grotto Sites, Mogao Grottoes, Dunhuang, People's Republic of China, June 28-July 3, 2004. Los Angeles: The Getty Conservation Institute, 2010. Archived from original
Guo Hong, Han Rubin, Huang Huaiwu, Lan Riyong, and Xie Riwan Types of Weathering of the Huashan Rock Paintings, in: Agnew, Neville, ed., Conservation of Ancient Sites on the Silk Road: Proceedings of the Second International Conference on the Conservation of Grotto Sites, Mogao Grottoes, Dunhuang, People's Republic of China, June 28-July 3, 2004. Los Angeles: The Getty Conservation Institute, 2010. Archived from original
