@book{3556,
	author = {Valsecchi, Francisco},
	title = {Qué es la economía},
	publisher = {Columba},
	year = {1979},
	address = {Buenos Aires :},
	edition = {12a. ed.},
	url = {https://biblioeco.unsa.edu.ar/pmb/images/libros/L127630.jpg}
}