@book{4270,
	author = {Johnson, Harry G. and Bronfenbrenner, M.},
	title = {Panoramas contemporáneos de la teoría económica},
	publisher = {Alianza Editorial},
	year = {1970},
	address = {Madrid :},
	url = {https://www.biblioeco.unsa.edu.ar/pmb/images/libros/L127371.jpg}
}