@book{40280,
	author = {Rideau, Alain.},
	title = {400 dificultades y problemas del niño},
	publisher = {Ediciones Mensajero},
	year = {1968.},
	series = {Comprender, saber, actuar},
	address = {Bilbao},
	note = {Translation of :400 [i.e. Quatre cents] difficultés et problèmes chez l'enfant.}
}