1. ASTM (American Society for testing and Materials) D7263-09 (1988). Standard Test Methods for Laboratory Determination of Density (Unit Weight) of Soil Specimens "Annual Book of ASTM Standards Section 4 Vol. 04.09 Soil and Rock; Building Stones " ASTM Philadelphia.
2. ASTM (American Society for testing and Materials) D4318-00 (1988). Standard Test Methods for Liquid Limit Plasticity Limit and Plasticity Index of Soils "Annual Book of ASTM Standards Section 4 Vol. 04.08 Soil and Rock; Building Stones " ASTM Philadelphia.
3. ASTM (American Society for testing and Materials) D854-02 (1988). Standard Test Methods for Specific Gravity of Soils "Annual Book of ASTM Standards Section 4 Vol. 04.08 Soil and Rock; Building Stones " ASTM Philadelphia.
4. ASTM (American Society for testing and Materials) D4546-14 (2003). Standard
5. Test Methods for One-Dimensional Swell or Collapse of Soils "Annual Book of