@book{2171,
	author = {Gladstone, John. and Humphreys, Kenneth King.},
	title = {Mechanical Estimating Guidebook /},
	publisher = {Mcgraw-Hill (Tx),},
	year = {1995.},
	address = {[S.l.] :},
	edition = {6th edition.},
	url = {http://10.10.170.122:8080/browse/book/29049}
}