@book{19357,
	author = { Gil Tabares, Claudia Marcela and  Vélez Sánchez, Diego Juan and   },
	title = {Ecos, teoría de las cuerdas /},
	publisher = {Corporación Unificada Nacional de Educación Superior,},
	year = {2020},
	address = {Bogotá (Colombia) :},
	edition = {                   },
	url = {https://drive.google.com/file/d/1yXiFyH9CxYcX-fnKEvN-_yu59dg5Bngs/view?usp=sharing}
}