@book{152240,
	author = {Villarreal, Arnulfo},
	title = {El Carbón mineral en México :},
	publisher = {E.D.I.A.P.S.A. ,},
	year = {1954},
	series = {Temas económicos y políticos contemporaneos de México},
	address = {México :},
	edition = {1a ed.}
}