1. Standard test method for particle-size analysis of soils (D 422-63);ASTM,1997
2. Standard test method for specific gravity of soils (D 854–92);ASTM,1997
3. Standard classification of soils for engineering purposes (unified soil classification system) (D 2487-93);ASTM,1997
4. Standard test method for capillary–moisture relationship for coarse- and medium-textured soils by porous-plate apparatus (D 2325-68);ASTM,1997
5. Seepage through dams;Casagrande;New England Water Works Association,1937