1. American Society for Testing and Materials ASTM (2000) D792-00 standard test methods for density and specific gravity (relative density) of plastics by displacement. Annual Book of ASTM Standards, Volume 08.01, Philadelphia
2. American Society for Testing and Materials ASTM (2002) D854-02 standard test methods for specific gravity of soil solids by water pycnometer. Annual Book of ASTM Standards, Volume 04.08, Philadelphia
3. American Society for Testing and Materials ASTM (1994) D2101 standard test methods for tensile properties of single man-made textile fibers taken from yarns and tows. Annual Book of ASTM Standards, Volume 07.01, Philadelphia
4. American Society for Testing and Materials ASTM (2002) D2256-02 standard test method for tensile properties of yarns by the single-strand method. Annual Book of ASTM Standards, Volume 07.01, Philadelphia
5. American Society for Testing and Materials ASTM (2000) D2487-00 standard practice for classification of soils for engineering purposes (Unified Soil Classification System). Annual Book of ASTM Standards, Volume 04.08, Philadelphia