@book{63250,
	author = {DIA INTERNACIONAL DE LOS TRABAJADORES and UGT},
	title = {1 Mayo},
	publisher = {CCOO Madrid :},
	year = {2019},
	address = {[Madrid] :},
	url = {https://docpublicos.ccoo.es/cendoc/071119PrimeroMAYOCCOOMadrid2019.pdf}
}