@book{667,
	author = {Fondo para la Normalización y Certificación de la Calidad},
	title = {Concreto. Agregados :},
	publisher = {FONDONORMA},
	year = {2000},
	address = {Caracas :},
	edition = {3ra rev.},
	note = {Gaceta Oficial N° --- de fecha ---},
	url = {https://sigbs.sencamer.gob.ve/cgi-bin/koha/opac-retrieve-file.pl?id=bd876f204320f2581201f4d293f5d3c2}
}