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3. ASTM D4318-17e1 (2017) Standard test methods for liquid limit, plastic limit, and plasticity index of soils. Annual Book of ASTM Standards, West Conshohocken, PA, USA
4. ASTM D4546-14e1 (2014) Standard test methods for one-dimensional swell or collapse of soils. Annual Book of ASTM Standards, West Conshohocken, PA, USA
5. ASTM D4959-16 (2016) Standard test method for determination of water content of soil by direct heating. Annual Book of ASTM Standards, West Conshohocken, PA, USA