Datta B., . (1990). Estimating & Costing in Civil Engineering: Theory & Practice. New Delhi: UBS Publishers Distributers Pvt.Ltd.
Datta B.N, . 1990. Estimating & Costing in Civil Engineering: Theory & Practice. New Delhi: UBS Publishers Distributers Pvt.Ltd.
Datta B.N, . Estimating & Costing in Civil Engineering: Theory & Practice. New Delhi: UBS Publishers Distributers Pvt.Ltd. 1990.