1. ASTM D2434-19 (2019) Standard test method for permeability of granular soils (constant head). ASTM International, West Conshohocken
2. ASTM D2487-17e1 (2017) Standard practice for classification of soils for engineering purposes (unified soil classification system). ASTM International, West Conshohocken
3. ASTM D2974-20e1 (2020) Standard test methods for determining the water (moisture) content, ash content, and organic material of peat and other organic soils. ASTM International, West Conshohocken
4. ASTM D2980-17e1 (2017) Standard test method for saturated density, moisture-holding capacity, and porosity of saturated peat materials. ASTM International, West Conshohocken
5. ASTM D4318-17e1 (2017) Standard test methods for liquid limit, plastic limit, and plasticity index of soils. ASTM International, West Conshohocken