@book{25737,
	author = {Popper, Karl R.},
	title = {La lógica de la investigación científica.},
	publisher = {Tecnos,},
	year = {1990.},
	address = {Madrid :},
	note = {El Ej. 1 es compra Expte. F.H. Nº 800-2536/93.}
}