Landslides and engineered slopes : from the past to the future : proceedings of the tenth International Symposium on Landslides and Engineered Slopes, 30 June-4 July, 2008, Xi'an, China /: from the past to the future : proceedings of the tenth International Symposium on Landslides and Engineered Slopes, 30 June-4 July, 2008, Xi'an, China. (©2008)