@book{47789,
	author = {DIA INTERNACIONAL DE LOS TRABAJADORES and UGT},
	title = {1º de Mayo 2020 :},
	publisher = {CCOO,},
	year = {2020},
	address = {[Madrid] :},
	url = {https://docpublicos.ccoo.es/cendoc/058075Primeromayo2020.pdf}
}