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Joseph, Gilbert and Pillai, V K (1987) Lime requirement of pond soils for aquaculture around Cochin backwaters. Marine Fisheries Information Service, Technical and Extension Series, 71. pp. 18-20.
Joseph, Gilbert (1985) A comparative study of the chemical composition of soils from aquaculture systems in the Cochin estuarine area. Masters thesis, Cochin University of Science and Technology.