@book{16315,
	author = {Heinrich Böll Stiftung and Spiller, Ingrid, coord. and Fundación Heinrich Böll (México, Centroamérica y el Caribe), ed.},
	title = {Picar piedra :},
	publisher = {Heinrich Böll Stiftung,},
	year = {2013},
	address = {México :},
	url = {https://www.poemas-del-alma.com/pedro-garfias.htm}
}