@book{8692,
	author = {Chakraborti, M.},
	title = {Estimating, Costing, Specification and Valuation in Civil Engineering},
	publisher = {Bhaktivedanta Book Trust,},
	year = {1996.},
	address = {Calcutta:},
	url = {http://books.google.com.pk/books/about/Estimating_Costing_Specification_and_Val.html?id=FnNGMwEACAAJ&redir_esc=y}
}