@book{69672,
	author = {Tiedt, Sidney W. and Tiedt, Iris M.},
	title = {Estudios sociales},
	publisher = {Unión Tipográfica Editorial Hispano Americana.},
	year = {c1968.},
	series = {Manual UTEHA breve},
	address = {México},
	note = {Translation of Imaginative social studies activities for the elementary school.}
}