@book{70090,
	author = {Bernart, Emanuel.},
	title = {Niños dificiles de educar},
	publisher = {Ediciones Studium},
	year = {1961.},
	series = {Colección "Hogar y pedagogia."},
	address = {Madrid},
	note = {Translation of Sorgenkinder der Volksschule.}
}