@book{20622,
	author = {DIA INTERNACIONAL DE LOS TRABAJADORES and CCOO},
	title = {1 Mayo Manifiesto Madrid},
	publisher = {Unión Sindical de Madrid Región,},
	year = {2011},
	address = {Madrid :},
	note = {En: Madrid Sindical, n. 157 (mayo 2011), p. 13},
	url = {https://docpublicos.ccoo.es/cendoc/029494Manifiesto1ºMayo.pdf}
}