@book{4150,
	author = {Popovics, Sandor.},
	title = {Concrete materials},
	publisher = {William Andrew,},
	year = {1992.},
	address = {[S.l.] :},
	edition = {2nd ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0815513089/chopaconline-20}
}