@book{28227,
	author = {Torón Villegas, Luis. and Esteve Torres, Adrian,},
	title = {Estudio de las zonas carboníferas de México ...},
	year = {1946-    .},
	series = {Investigaciones industriales del Banco de México.},
	address = {[México]},
	note = {At head of title: Luis Torón Villegas. Adrián Esteve Torres.}
}