@book{6507,
	author = {Johnston, Elizabeth B. and Johnston, Andrew V.},
	title = {Desarrollo del lenguaje},
	publisher = {Editorial Médica Panamericana},
	year = {1988},
	series = {Educación especial},
	address = {Buenos Aires},
	edition = {1ª ed.},
	note = {Contiene glosario e índice analítico}
}