@book{65322,
	author = {Freitag, Helmuth. and Mercadas Medina, Juan.},
	title = {Los materiales de los aparatos químicos / },
	editor = {Sobrinos de López Robert)},
	publisher = {Manuel Marín, },
	year = {1944 (},
	address = {Barcelona : },
	edition = {3ª ed. alemana rev. y amp. }
}