@book{1971,
	title = {Estudio R2b1 /},
	publisher = {Saint Gobain Argentina (Weber),},
	year = {2017.},
	series = {Colección el material de lo construido, 11.},
	address = {CABA:},
	url = {https://www.ar.weber/files/ar/2018-06/Material%20de%20lo%20construido%2011%20-%20R2B1.pdf}
}