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B.N.Datta, . (1990). Estamating & Costing in Civil Engg. New Delhi: UBS Publishers Distributers Pvt.Ltd.
B.N.Datta, . 1990. Estamating & Costing in Civil Engg. New Delhi: UBS Publishers Distributers Pvt.Ltd.
B.N.Datta, . Estamating & Costing in Civil Engg. New Delhi: UBS Publishers Distributers Pvt.Ltd. 1990.