1. ASTM D2216 2010 Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass 10.1520/D2216 www.astm.org
2. ASTM D4318 2010 Standard Testing Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils 10.1520/D4318 www.astm.org
3. ASTM D6913 2009 Standard Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis 10.1520/D6913-04R09E01 www.astm.org
4. Arctic ecological classifications derived from vegetation community and satellite spectral data;Atkinson;Remote Sensing,2012