@book{21433,
	author = {Jacobs, J. Vernon },
	title = {Teaching problems and how to solve them},
	publisher = {Zondervan Publishing House, },
	year = {c1962},
	address = {Grand Rapids : },
	edition = {1 ed.},
	note = {Como resolver los problemas de enseñanza en la Escuela Dominical}
}