@book{69620,
	author = {Montgomery, Gaylord C. and Dodd, Alan.},
	title = {Enseñanza de la matemática, la ciencia y los estudios sociales},
	publisher = {Editorial Paidós},
	year = {1969.},
	series = {Biblioteca del educador contemporáneo.},
	address = {Buenos Aires},
	note = {Translation from Teacher's encyclopedia.}
}