@book{26423,
	author = {Hatch, Raymond N. and Costar, James W.},
	title = {Actividades de orientacion en la escuela primaria /},
	publisher = {Limusa,},
	year = {1978.},
	address = {Mexico :},
	edition = {2a ed.},
	note = {Titulo original: Guidance services in the elementary school.}
}