@book{4441,
	author = {Sund, Robert B. and Trowbridge, Leslie W.},
	title = {La enseñanza de la ciencia en la escuela secundaria},
	publisher = {Paidós},
	year = {1969},
	address = {Buenos Aires},
	edition = {1ª ed.},
	note = {Apéndice p. 340-350}
}