Typical matric suction measurements in the laboratory and in the field using thermal conductivity sensors : Rahardjo, H; Loi, J; Fredlund, D G Proc Indian Geotechnical Conference, 1989, Geotechniques of Problematic Soils and Rocks, Visakhapatnam, 14–16 December 1989V1, P127–131. Publ New Delhi: Sarita Prakashan, 1989