1. Void ratio of noncohesive soils and similar materials;Aberg;J. Geotech. Eng.,1992
2. Particle size measurement;Allen,1997
3. Standard Test Method for Particle-Size Analysis of Soil;ASTM D422-63,2007
4. Standard test methods for maximum index density and unit weight of soils using a vibratory table;ASTM D4253-00,2006
5. Standard test methods for minimum index density and unit weight of soils and calculation of relative density;ASTM D4254-00,2006