1. ASTM D422-63 (2007) Standard test method for particle-size analysis of soils. ASTM International, West Conshohocken
2. ASTM D2487 (2010) Standard practice for classification of soils for engineering purposes (unified soil classification system). ASTM International, West Conshohocken
3. ASTM D4318 (2010) Standard test method for liquid limit, plastic limit, and plasticity index of soils. ASTM International, West Conshohocken
4. ASTM D2435 (2011) Standard test methods for one-dimensional consolidation properties of soils using incremental loading. ASTM International, West Conshohocken
5. ASTM D854 (2014) Standard test methods for specific gravity of soil solids by water pycnometer. ASTM International, West Conshohocken