@book{ BC15670628, author = "International Conference on Unsaturated Soils and American Society of Civil Engineers and American Society of Civil Engineers. Geo-Institute and International Society of Soil Mechanics and Geotechnical Engineering. Committee TC6 on Unsaturated Soils and Canadian Geotechnical Society and Miller, Gerald A.", title = "Unsaturated soils 2006 : proceedings of the fourth international conference on unsaturated soils : April 2-6, 2006 Carefree, Arizona", publisher = "American Society of Civil Engineers", year = "2006", series = "Geotechnical special publication", number = "no. 147", URL = "https://ci.nii.ac.jp/ncid/BC15670628" }