@book{21952,
	author = {Natorp, Paul, and Larroyo, Francisco,},
	title = {Propedéutica filosófica ;},
	publisher = {Porrúa },
	year = {1987.},
	series = {Sepan cuantos..;},
	address = {México },
	edition = {2a ed.},
	note = {Traducción de: Philosophische propedeutik, Kunt und die Marburger schule, Allgemeine piidagogik.}
}