@book{152812,
	author = {Valdespino Echauri, Leticia.},
	title = {La educación preescolar en zonas marginadas},
	publisher = {Editorial Trillas},
	year = {1990 (reimp. 1991).},
	series = {Pedagogía para la primera infancia},
	address = {México},
	edition = {2. ed.}
}