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   3. Indian Standard IS 1077: 1992, „Common Burnt Clay Building Bricks –Specification‟, August 1996
   4. Indian Standard IS 3495 (Parts 1 to 4): 1992, „Methods of Tests of Burnt Clay Building Bricks‟,October 1998. [5] Ritwik Sarkar, Narsingh, Swapan kumar Das (), „Effect of Addition of Pond ash and Fly ash on Properties of Ash-Clay Burnt Bricks‟, Waste Mgt & Res, vol.2, no.4, pp.566-571, 2007.
   5. J. Sengupta, “Fly ash-Lime-Bricks as an Alternative Walling Material”, New Building Materials, CE & CR, pp.12-15.1993.
   6. Sunil kumar (2002), „A Perspective Study on Fly ash-LimeGypsum Bricks and Hollow Blocks for Low Cost Housing Development‟, Construction and Building Materials, vol.16, no.4, pp.519-525, 2002.