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3. Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System);American Society for Testing and Materials (ASTM),2011
4. An evaluation of the interface behaviour of rail subballast stabilised with geogrids and geomembranes;Biabani;Geotext. Geomembranes,2015
5. Studies on the bearing capacity of strip footing on slopes;Borthakur,1988