@book{16489,
	author = {Vásquez Molina Nicolás Francisco (et.al) and Lizeth Carolina Gaitán Ruiz },
	title = {Uso de Materiales no convencionales en la Elaboración de Concretos },
	publisher = {ITFIP },
	year = {2020},
	address = {Espinal Tolima },
	note = {ITFIP }
}