@book{68808,
	author = {Dutton, Wilbur H.},
	title = {Cómo evaluar el aprendizaje de la matemática},
	publisher = {Angel Estrada y Cia.},
	year = {c1969.},
	address = {Buenos Aires},
	note = {Traaanslation of : Evaluating pupils' understanding of arithmetic.}
}