1. Sathy Chandrasekhar, Gracey Thomas, Lalithambika, M. and Damodaran, A. D. “Characterization of plastic clays,” under publication.
2. ASTM Standards Part 19, D–424–59 (1971), Standard test methods for plastic limit and plastic index of soils, ASTM, Philadelphia.
3. Indian Standard Specification of Ball Clays for Ceramic Industry, IS–4589, 1968.
4. Black, C. A.Methods of Soil Analysis, Part II, pp. 1409–1420, American Society of Agronomy, Madison, Wisconsin, USA (1965).